The Pros & Cons of Hitchhikers in the Reef Aquarium (:Coping With Incidental Life As A Reefer), Part 1, Part 2, Part 3, Part 4, by Bob Fenner
10 Most Surprising Aquarium Hitchhikers (Good and Bad) by Bob Fenner

 --Live Rock/"Hitchhikers"--

FAQs on: Live Rock (LR) "Hitchhiker "Identification: LR ID 1, LR ID 2, LR ID 3, LR ID 4, LR ID 5, LR ID 6, LR  ID 7, LR ID 8, LR ID 9, LR ID 10, LR ID 11, LR ID 12, LR ID 13, LR ID 14, LR ID 15, LR ID 16, LR ID17, LRID 18, LRID 19, LRID 20, LRID 21, LRID 22, LRID 23, LRID 24, LRID 25, LRID 26, LRID 27, LRID 28, LRID 29, LRID 30, LRID 31, LRID 32, LRID 33, LRID 34, LRID 35, LRID 36, LRID 37, LRID 38, LRID 39, LRID 40, LRID 41, LRID 42, LRID , & <Ditto>

 --Algal Groups--

FAQs on: Algae ID Visual Guide, Algae ID 1, Algae ID 2, Algae ID 3, Algae ID 4, Algae ID 5, Algae ID 6, Algae ID 7, Algae ID 8, Algae ID 9, Algae ID 10, Algae ID 11, Algae ID 12, Algae ID 13, Algae ID 14, Algae ID 15, Algae ID 16, Algae ID 17, Algae ID 18, Algae ID 19, Marine Algae ID 20, Marine Algae ID 21, Marine Algae ID 22, Marine Algae ID 23, Marine Algae ID 24, Marine Algae ID 25, SW Algae ID 26,  SW Algae ID 27, SW Algae ID 28, SW Algae ID 29, SW Algae ID 30, SW Algae ID 31, SW Algae ID 32, SW Algae ID 33, SW Algae ID 34, SW Algae ID 35, SW Algae ID 36, SW Algae ID 37, SW Algae ID 38, SW Algae ID 39, SW Algae ID , &
Algae ID FAQs by Group/Division/Family: BGA Identification 1, BGA/Cyano ID 2, BGA/Cyano ID 3, BGA/Cyano ID 4, BGA/Cyano ID , & Chlorophyte/Green Algae Identification, Green Macro-Algae ID 2, Green Macro-Algae ID 3, Green Macro-Algae ID 4, Green Macro-Algae ID 5, Green Macro Algae ID 6, Green Macro Algae ID 7, Green Macro Algae ID 8, Green Macro Algae ID , & Caulerpa Identification, Diatom Identification, Brown Algae Identification 1, Brown Algae ID 2, Brown Algae ID 3, Brown Algae ID 4, Red Algae Identification, Red Algae ID 2, Red Algae ID 3, Red Algae ID 4, Red Algae ID5, Red Algae ID 6, Red Algae ID 7, Red Algae ID 8, Red Algae ID 9, Red Algae ID 10, Red Algae ID 11, Red Algae ID 12, Red Algae ID , Coralline Algae Identification,

 --Unknown Invertebrates--

Marine Invertebrate Overview by Bob Fenner
FAQs on: Marine Invert.s 1, Marine Invert.s 2,  Marine Invert.s 3, (including Mystery Creatures)

Guidelines for ID Questions by Lynn Zurik, ID Guide Flowchart by Lynn Zurik, Marine Invertebrate Identification Source Books by Lynn Zurik,
FAQs on: Marine Invertebrate Identification (See above re Guidelines/Questions for IDs, and LynnZ's ID Guide Flowchart): Marine Invertebrate ID Reference, Invert. ID 1, Invert. ID 2, Invert. ID 3, Invert. ID 4, Invert. ID 5, Invert. ID 6, Invert. ID 7, Invert. ID 8, Invert. ID 9, Invert. ID 10, Invert. ID 11, Invert. ID 12, Invert. ID 13, Invert. ID 14, Invert. ID 15, Invert. ID 16, Invert. ID 17, Invert. ID 18, Invert ID 19, Invert. ID 20, Invert. ID 21, Invert. ID 22, Invert. ID 23, Invert. ID 24, Invert. ID 25, Invert ID 26, Invert ID 27, Invert ID 28, Invert. ID 29, Invert. ID 30 Invert. ID 31, Invert. ID 32, Invert. ID 33, Invert. ID 34, Non-Vert ID 35, Non-Vert ID 36, Non-Vert ID 37, Non-Vert ID 38, Non-Vert ID 39, Non-Vert ID 40, Non-Vert ID 41, Non-Vert ID 42, Non-Vert ID 43, Non-Vert ID 44, Non-Vert ID 45, Non-Vert ID 46, Non-Vert ID 47, Non-Vert ID 48, Non-Vert ID 49, Non-Vert ID 50, Non-Vert ID 51, Non-Vert ID 52, Non-Vert ID 53, Non-Vert ID 54, Non-Vert ID 55, Non-Vert ID 56, Non-Vert ID 57, Non-Vert ID 58, Non-Vert ID 59, Non-Vert ID 60, Non-Vert ID 61, Non-Vert ID 62, Non-Vert ID 63, Non-Vert ID 64, Non-Vert ID 65, Non-Vert ID 66, Non-Vert ID 67, Non-Vert ID 68, Non-Vert ID 69, Non-Vert ID ,
FAQs on: Marine Invertebrate Behavior, Marine Invertebrate Compatibility/Control, Marine Invertebrate Stocking/Selection, Marine Invertebrate Systems, Feeding Reef Invertebrates, Marine Invertebrate Disease, Marine Invertebrate Reproduction, (A note to make, adopt/adapt a useful dichotomous key...) 

--Live Sand--

FAQs on Live Sand: Identification, Biota,  

Sponge Identification
FAQs on: Sponge ID 1, Sponge ID 2, Sponge ID 3, Sponge ID 4, Sponge ID 5, Sponge ID 6, Sponge ID 7, Sponge ID 8, Sponge ID 9, Sponge ID 10, Sponge ID 11, Sponge ID 12, Sponge ID 13, Sponge ID 14, Sponge ID 15, Sponge ID 16, Sponge ID 17, Sponge ID 18, Sponge ID 19, Sponge ID 20, Sponge ID 21, Sponge ID ,

--Cnidarian Identification--

FAQs on: Cnidarian ID 1, Cnidarian ID 2, Cnidarian ID 3, Cnidarian ID 4, Cnidarian ID 5, Cnidarian ID 6, Cnidarian ID 7, Cnidarian ID 8, Cnidarian ID 9, Cnidarian ID 10, Cnidarian ID 11, Cnidarian ID 12, Cnidarian ID 13, Cnidarian ID 14, Cnidarian ID 15, Cnidarian ID 16, Cnidarian ID 17, Cnidarian ID 18, Cnidarian ID 19, Cnidarian ID 20, Cnidarian ID 21, Cnidarian ID 22, Cnidarian ID 23, Cnidarian ID 24, Cnidarian ID 25, Cnidarian ID 26, Cnidarian ID 27, Cnidarian ID 28, Cnidarian ID 29, Cnidarian ID 30, Cnidarian ID 31, Cnidarian ID 32, Cnidarian ID 33, Cnidarian ID 34, Cnidarian ID 35, Cnidarian ID ,

Hydrozoan (Hydroids, Hydropolyps, Stylasterines) Identification
FAQs on: Hydrozoan Identification, Hydrozoan ID 2, Hydrozoan ID 3, Hydrozoan ID 4, Hydrozoan ID 5, Hydrozoan ID 6, Hydrozoan ID 7, Hydrozoan ID 8, Hydrozoan ID , &

Jellies: Hydrozoan/Scyphozoan/Ctenophore... Medusoid ID
FAQs on: Jelly/Medusoid ID,

Sea Fan/Gorgonian Identification
FAQs on: Gorgonian, Sea Fan Identification 1, Sea Fan ID 2, Sea Fan ID 3, Sea Fan ID 4, Sea Fan ID ,

Stoloniferan Polyp/Clavulariid Identification
FAQs on: Polyp/Clavulariid Identification 1, Polyp/Clavulariid ID 2, Polyp/Clavulariid ID 3, Polyp/Clavulariid ID 4, Polyp/Clavulariid ID ,

 --Soft Coral Identification--

Soft Coral Identification
FAQs on: Soft Coral ID 1, Soft Coral ID 2,

Leather Coral Identification/Alcyoniid Identification
FAQs on: Alcyoniid ID 1, Alcyoniid ID 2, Alcyoniid ID 3, Alcyoniid ID 4,

Tree/Nephtheid Identification
FAQs on: Nephtheid ID 1, Nephtheid ID 2, Nephtheid ID 3, Nephtheid ID 4, Nephtheid ID ,

Pulsing/Xeniid Identification
FAQs on: Xeniid ID 1,

Mushroom/Corallimorpharian Identification
FAQs on: Mushroom ID 1, Mushroom ID 2, Mushroom ID 3, Mushroom ID 4, Mushroom ID 5, Mushroom ID 6, Mushroom ID 7,

Zoanthid Identification
FAQs on: Zoanthid ID 1, Zoanthid ID 2, Zoanthid ID 3, Zoanthid ID 4, Zoanthid ID 5, Zoanthid ID 6,

--Anemone Identification--

Guidelines for ID Questions by Lynn Zurik, ID Guide Flowchart by Lynn Zurik, Marine Invertebrate Identification Source Books by Lynn Zurik,
Anemone Identification (See above re Guidelines/Questions for IDs, and LynnZ's ID Guide Flowchart)
FAQs on: Anemone ID 1, Anemone ID 2, Anemone ID 3, Anemone ID 4, Anemone ID 5, Anemone ID 6, Anemone ID 7, Anemone ID 8, Anemone ID 9, Anemone ID 10, Anemone ID 11, Anemone ID 12, Anemone ID 13, Anemone ID 14, Anemone ID 15, Anemone ID 16, Anemone ID 17, Anemone ID 18, Anemone ID 19, Anemone ID 20, Anemone ID 21, Anemone ID 22, Anemone ID 23, Anemone ID 24, Anemone ID 25, Anemone ID 26, Anemone ID 27, Anemone ID 28, Anemone ID 29, Anemone ID 30, Anemone ID 31, Anemone ID 32, Anemone ID 33, Anemone ID 34, Anemone ID 35, Anemone ID 36, Anemone ID 37, Anemone ID 38, Anemone ID 39, Anemone ID 40, Anemone ID 41, Anemone ID 42, Anemone ID 43, Anemone ID 44, Anemone ID 45, Anemone ID ,

Bubble Tip Anemone Identification
FAQs on: BTA, Entacmaea quadricolor ID,

Carpet Anemone Identification:  
FAQs on Carpet Anemone Identification,

Glass Anemone/Aiptasia Identification
FAQs on: Aiptasia, ID 1, Aiptasia ID 2, Aiptasia ID 3,   

Other Pest Anemone Identification
FAQs on: Other Pest Anemone ID, Anemonia majano ID 1, Anemonia ID 2,

Long Tentacle Anemone Identification
FAQs on: LTA Identification,

Magnificent Anemone Identification
FAQs on: Magnificent Anemone Identification,

Sebae Anemone Identification
FAQs: Sebae, Heteractis crispa Identification,

--Stony Corals--

Stony Coral Identification
FAQs on: Stony Coral ID 1, Stony Coral ID 2, Stony Coral ID 3, Stony Coral ID 4, Stony Coral ID 5, Stony Coral ID 6, Stony Coral ID 7, Stony Coral ID 8, Stony Coral ID 9, Stony Coral ID 10, Stony Coral ID 11, Stony Coral ID 12, Stony Coral ID 13, Stony Coral ID 14, Stony Coral ID 15, Stony Coral ID ,

           Acroporid Identification
FAQs on: Acroporid ID 1,

           Caryophyllid Identification
FAQs on: Caryophyllid ID 1,

           Dendrophylliid Identification
FAQs on: Dendrophylliid ID 1,

           Faviid Identification
FAQs on: Faviid ID 1,

           Fungiid Identification
FAQs on: Fungiid ID 1,

           Merulinid Identification
FAQs on: Merulinid Identification,

           Mussid Identification
FAQs on: Mussid Identification 1, Mussid ID 2, Mussid ID 3, Mussid ID 4, Mussid ID ,

           Poritid Identification
FAQs on: Poritid ID 1,

           Trachyphylliid
FAQs on: Trachyphylliid ID 1,

Guidelines for ID Questions by Lynn Zurik,
ID Guide Flowchart by Lynn Zurik,
Marine Invertebrate Identification Source Books by Lynn Zurik,
Worm Identification (See above re Guidelines/Questions for IDs, and LynnZ's ID Guide Flowchart)
FAQs on: Worm ID 1, Worm ID 2, Worm ID 3, Worm ID 4, Worm ID 5, Worm ID 6, Worm ID 7, Worm ID 8, Worm ID 9, Worm ID 10, Worm ID 11, Worm ID 12, Worm ID 13, Worm ID 14, Worm ID 15, Worm ID 16, Worm ID 17, Worm ID 18, Worm ID 19, Worm ID 20, Worm ID 21, Worm ID 22, Worm ID 23, Worm ID , &

Flatworm Identification
FAQs on: Flatworm ID 1, Flatworm ID 2, Flatworm ID 3, Flatworm ID 4, Flatworm ID 5, Flatworm ID 6, Flatworm ID ,

Proboscis Worm/Nemertean Identification
FAQs on: Nemertean, Proboscis, Ribbon Worm ID 1,

--Aschelminths/Pseudocoelomates...--

Roundworm/Nematode Identification
FAQs on: Nematode, Roundworm ID 1,

Horsehair Worm/Nematomorpha Identification
FAQs on: Nematomorpha, Horsehair Worm ID 1,

Thorny-headed Worm/Acanthocephalan Identification
FAQs on: Acanthocephalans, Thorny-headed Worm ID 1,

--Annelids: Segmented Worms--

Sedentariate (tube-dwelling...) Polychaetes Identification
FAQs on: Tubeworm/Featherduster ID 1, Featherduster ID 2, Featherduster ID 3, Featherduster ID 4,

Errantiate Polychaete/Bristleworm Identification
FAQs on: Bristle Worm ID 1, Bristleworm ID 2, Bristleworm ID 2, Bristleworm ID 3, Bristleworm ID 4, Bristleworm ID 5, Bristleworm ID 6, Bristleworm ID 7, Bristleworm ID 8, Bristleworm ID ,

Leech/Hirudinean Identification
FAQs on: Hirudineans, Leech ID 1,

--Lesser Protostomes--

Peanut Worm/Sipunculid Identification
FAQs on: Sipunculids, Peanut Worm ID 1,

Sausage Worm/Echiuran Worm Identification
FAQs on: Echiuran Worm ID 1,

Marine Snail Identification (See above re Guidelines/Questions for IDs, and LynnZ's ID Guide Flowchart)
FAQs on: Snail ID 1, Snail ID 2, Snail ID 3, Snail ID 4, Snail ID 5, Snail ID 6, Snail ID 7, Snail ID 8, Snail ID 9, Snail ID 10, Snail ID 11, Snail ID 12, Snail ID 13, Snail ID 14, Snail ID 15, Snail ID 16, Snail ID 17, Snail ID 18, Snail ID 19, Snail ID 20, Snail ID 21, Snail ID 22, Snail ID 23, Snail ID 24, Snail ID 25, Snail ID 26, Snail ID 27, Snail ID 28, Snail ID 29, Snail ID 30, Snail ID , &
FAQs on: Snail Egg ID 1, Snail Egg ID 2, Snail Egg ID 3, Snail Egg ID ,

Chiton Identification
FAQs on:  Chiton ID 1, Chiton ID 2, Chiton ID 3, Chiton ID 4,

Archaeogastropods, Identification
FAQs on: Abalone ID, Limpet ID 1, Limpet ID 2,

Tube Snails, Vermetid Identification
FAQs on: Tube Snail ID 1,  

Seaslug (including Sea Hares, Sidegills, Headshields...) Identification
FAQs on: Seaslug ID 1, Seaslug ID 2, Seaslug ID 3, Seaslug ID 4, Seaslug ID ,

Nudibranch Identification
FAQs on: Nudibranch ID 1, Nudibranch ID 2, Nudibranch ID 3, Nudibranch ID 4, Nudibranch ID 5, Nudibranch ID 6, Nudibranch ID 7, Nudibranch ID ,

Bivalve Identification
FAQs on: Bivalve ID 1,

Tridacnid Identification
FAQs on: Tridacnid ID 1,

Seahare Identification
FAQs on: Seahare Identification,

Octopus, Squid.../Cephalopod Identification
FAQs on: Cephalopod ID 1,

Guidelines for ID Questions by Lynn Zurik,
ID Guide Flowchart by Lynn Zurik,
Marine Invertebrate Identification Source Books by Lynn Zurik, Marine Crab Identification (See above re Guidelines/Questions for IDs, and LynnZ's ID Guide Flowchart)

Crustacean Identification
FAQs on: Crustacean ID 1,  Crustacean ID 2,   Crustacean ID 3, Crustacean ID 4, Crustacean ID ,

FAQs on: Marine Crab ID 1, Marine Crab ID 2, Marine Crab ID 3, Marine Crab ID 4, Marine Crab ID 5, Marine Crab ID 6, Marine Crab ID 7, Marine Crab ID 8, Marine Crab ID 9,  Marine Crab ID 10, Marine Crab ID 11, Marine Crab ID 12, SW Crab ID 13, SW Crab ID 14, SW Crab ID 15, SW Crab ID 16, SW Crab ID 17, SW Crab ID 18, SW Crab ID 19, SW Crab ID 20, SW Crab ID 21, SW Crab ID 22, SW Crab ID ,

Microcrustaceans/"Pods" & Much More Identification
FAQs on: Micro-crustacean Amphipods, Copepods, other Small Shrimp-like ID 1, Small Crustacean ID 2, Small Crustacean ID 3, Small Crustacean ID 4, Small Crustacean ID ,

Shrimp Identification
FAQs on: Shrimp ID 1,

Pistol Shrimp
FAQs on: Alpheid ID,  

Mantis Shrimp Identification
FAQs on: Mantis Identification,  

Hermit Crab Identification
FAQs on: Hermit ID 1, Hermit IDs 2, Hermit IDs 3, Hermit IDs 4,

Isopod Identification
FAQs on: Isopod ID 1,

Seastar Identification
FAQs on: Seastar ID 1,  Sea Star ID 2, Sea Star ID 3, Sea Star ID 4, Seastar ID 5, Seastar ID 6, Seastar ID 7, Seastar ID 8, Seastar ID 9,
by Group: Asterina ID, CC Star Identification, Fromia Identification, Linckia Identification, Sandsifting Star ID,

Brittlestar, Basketstar Identification
FAQs on: Brittlestar ID 1, Brittlestar ID 2, Brittlestar ID 3

Sea Cucumber
FAQs on: Cuke ID 1, Cuke ID 2, Cuke ID 3, Cuke ID 4, Cuke ID 5, Cuke ID 6, Cuke ID 7, Cuke ID 8,

Sea Urchin Identification
FAQs on: Urchin ID 1, Urchin ID 2, Urchin ID 3, Urchin ID 4,    

Sea Squirt/Ascidian Identification
FAQs on: Ascidian/Sea Squirt ID, Sea Squirt ID 2, Sea Squirt ID 3, Sea Squirt ID 4, Sea Squirt ID 5, Sea Squirt ID 6, Sea Squirt ID 7, Sea Squirt ID 8, Sea Squirt ID ,

--Microbes, Plankton--

Marine Microbes by [to be written]
FAQs on: Marine Microbes

Marine Virology by [to be written]
FAQs on: Marine Virus,  

Marine Bacteria by [to be written]
FAQs on: Marine Bacteria,

Marine Mycology by [to be written]
FAQs on: Marine Fungus,

Marine Protozoans by [to be written]
FAQs on: Marine Protozoans, including Foraminiferans

Marine Plankton by [to be written]
FAQs on: Marine Plankton, 

Phytoplankton, Use in  Marine Aquariums by Sara Mavinkurve
FAQs on: Marine Phytoplankton,

Algae Can Be Your Friend Part 1, Part 2  by Bob Fenner
Algae for Small Systems by Bob Fenner
FAQs on: Algae Being Your Friend,

Algae Identification:
FAQs on: Marine Algae Identification FAQs 1,  Marine Algae ID 2,  Marine Algae ID 3,  Marine Algae ID 4,  Marine Algae ID 5, Marine Algae ID 6, Marine Algae ID 7, Marine Algae ID 8, Marine Algae ID 9, Marine Algae ID 10, Marine Algae ID 11, Marine Algae ID 12, Marine Algae ID 13, Marine Algae ID 14, Marine Algae ID 15, Marine Algae ID 16, Marine Algae ID 17, &
FAQs on: BGA Identification 1, BGA/Cyano ID 2, BGA/Cyano ID 3, BGA/Cyano ID 4, BGA/Cyano ID , &
FAQs on: Chlorophyte/Green Algae Identification,
FAQs on: Green Macro-Algae ID 2, Caulerpa Identification,
FAQs on: Brown Algae Identification,
FAQs on: Diatom Identification,
FAQs on: Red Algae Identification, Red Algae ID 2, Coralline Algae Identification,

Algae Control Articles: Division/Group articles below
Marine Algae/Control by Bob Fenner
Avoiding Algae Problems by Bob Fenner
Blue Green Algae /Cyanobacteria Control by Bob Fenner
Marine Maintenance by Bob Fenner 
Marine Scavengers by Bob Fenner
  Snails, Part 2 by Bob Fenner
Hermit Crabs by Bob Fenner
Mithrax/Emerald Green Crabs by Bob Fenner
Sea Urchins, Part 2 by Bob Fenner
Blennies by Bob Fenner
Ctenochaetus/Bristle Mouth Tangs by Bob Fenner
Zebrasoma/Sailfin Tangs by Bob Fenner
Marine Algae by Bob Fenner
Coralline Algae by Bob Fenner
Green Algae by Bob Fenner
Brown Algae by Bob Fenner

Algae Control FAQs Files:
FAQs on: Algae Control,  Marine Algae Control FAQs 2, Marine Algae Control 3, Marine Algae Control 4, Marine Algae Control 5,  Marine Algae Control 6, Marine Algae Control 7, Marine Algae Control 8, Marine Algae Control 9, Marine Algae Control 10, Marine Algae Control 11, Marine Algae Control 12, Marine Algae Control 13, Marine Algae Control 14, Marine Algae Control 15, &
Avoiding Algae Problems
Marine Algicide Use
Nutrient Limitation
Marine Algae Eaters, Marine Algae Eaters 2
Culturing Macro-Algae

FAQs on BGA/Cyano Control:
Controlling: BGA/Cyano 1, Cyano Control 2, Cyano Control 3, Cyano Control 4, Cyano Control 5, Cyano Control 6, Cyano Control 7, Cyano Control 8, Cyano Control 9, Cyano Control 10, Cyano Control 11, BGA Control 12, BGA Control 13, BGA Control 14, BGA Control 15, BGA Control 16, BGA Control 17, BGA Control 18, BGA Control 19, BGA Control 20, &

Other algae control FAQs:
Red/Encrusting Algae, Green Algae, Green Algae Control 2, Green Algae Control 3, Green Algae Control 4, Green algae Control 5,
Chlorophyte Compatibility/Control, Brown/Diatom Algae, Diatom Control 2, Diatom Control 3, Diatom Control 4,
Red Algae Compatibility/Control,
Coralline Algae Compatibility/Control,
Skimmers, Skimmer Selection,

--Algae Groups--

Macro-Algae Use in Marine Aquariums by Bob Fenner
FAQs on Macro-Algae: Marine (Macro) Algae 1, Marine (Macro) Algae 2, Marine (Macro) Algae 3, Marine (Macro) Algae 4, Marine (Macro) Algae 5, & Rationale/Use, Identification, Macro Algae Selection/Compatibility/Control 1, Marine Macro-Algae Sel./Comp 2, Marine Macro-Algae Sel./Comp. 3, Systems, Lighting, Nutrition, Disease/Pests/Predators, Culture

Sponges