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Discovery stream
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Waminoa Coral Flatworms (Waminoa spp.)
Waminoa are small flatworms that sit on coral tissue and can cause chronic irritation and shading, especially when populations build up.
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Vermetid Snails (Vermetidae spp.)
Vermetid snails are tube-dwelling pests that spread on rock and frag plugs and irritate corals with sticky mucus webs.
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Red Planaria Flatworms
Red planaria are common nuisance flatworms that multiply quickly in low-flow, detritus-rich areas. Heavy infestations can shade and irritate corals, and large die-offs during...
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Vermetid Snails
Vermetid snails are tube-dwelling pests that spread on rock and frag plugs and feed with sticky mucus webs. Their webs can irritate corals and...
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Aiptasia
Aiptasia are fast-spreading pest anemones that hitchhike into reef tanks and sting corals. Catch and control them early—once established, they’re difficult to eradicate.
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Red Planaria (Convolutriloba retrogemma)
Rust-Brown Flatworms / Red Planaria are common nuisance flatworms that multiply fast in low-flow areas and can irritate corals or foul the tank during...
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Predatory Oenone Worm (Oenone fulgida)
Oenone worms are hidden predators often blamed for unexplained snail losses and empty shells in reef tanks.
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Bobbit Worm (Eunice aphroditois)
Bobbit worms are rare but notorious ambush predators that hide deep in rock or sand and can cause mysterious fish and invert losses.
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Bearded Fireworm (Hermodice carunculata)
Bearded fireworms are predatory, stinging polychaetes that can damage corals and eat inverts, and they’re not the “normal” bristleworm you ignore.
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Bristleworms (Eurythoe spp.)
Bristleworms are common reef hitchhikers that usually help clean detritus, but large individuals and certain species can become nuisance pests.
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Spirobid Worms (Spirorbidae spp.)
Spirorbid worms are tiny white spiral tube worms that commonly appear in reef tanks and are usually harmless hitchhikers.
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Lymphocystis (Lymphocystivirus)
Lymphocystis is a stress-linked viral condition that causes cauliflower-like nodules on fins or skin and often looks scary but is usually not deadly and...
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Marine Leeches (Piscicolidae; e.g., Trachelobdella spp.)
Marine leeches are external parasites that attach to fish and cause wounds, stress, and sometimes heavy breathing when near gills, and a visible leech...
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Skin Flukes (Benedenia spp.)
Benedenia skin flukes cause chronic scratching, mucus buildup, and stressed, faded-looking fish, and they can persist in systems without proper quarantine and follow-through.
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Eye/Skin Flukes (Neobenedenia melleni)
Neobenedenia flukes are contagious skin and eye parasites that cause flashing, excess mucus, and cloudy eyes, and they’re often missed because they look like...
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Marine Ich (Cryptocaryon irritans)
Marine ich is a contagious parasite that causes white “salt grain” spots, flashing, and breathing stress in saltwater fish. It can cycle in the...
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Hydroids
Hydroids are stinging colonial polyps that hitchhike into reef tanks and can spread across plugs, racks, and rockwork. They often irritate corals and cause...
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Myrionema Hydroids
Myrionema hydroids are stinging colonial polyps that often spread around zoa mats and frag plugs, causing localized zoanthid irritation and persistent closure. They thrive...
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Christmas-Tree Hydroid
Fire/Christmas-tree hydroids are stinging Pennaria colonies that look like tiny feathery “mini trees” on plugs, racks, and sump/overflow surfaces. They can irritate corals—and sting...
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Zoanthid-Eating Nudibranch
Zoanthid-eating nudibranchs are tiny, camouflaged predators that eat zoa polyps and can wipe colonies fast. They hide in mats and lay eggs, so outbreaks...