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Predatory Oenone Worm (Oenone fulgida) ARTICLE

Predatory Oenone Worm (Oenone fulgida)

Oenone worms are hidden predators often blamed for unexplained snail losses and empty shells in reef tanks.

Reefapedia 1 min read
Spirobid Worms (Spirorbidae spp.) ARTICLE

Spirobid Worms (Spirorbidae spp.)

Spirorbid worms are tiny white spiral tube worms that commonly appear in reef tanks and are usually harmless hitchhikers.

Reefapedia 1 min read
Hydroids ARTICLE

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...

Reefapedia 4 min read
Myrionema Hydroids ARTICLE

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...

Reefapedia 4 min read
Christmas-Tree Hydroid ARTICLE

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...

Reefapedia 4 min read
Zoanthid-Eating Nudibranch ARTICLE

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...

Reefapedia 4 min read
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