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Browse launch-approved Reefapedia knowledge, then refine by type, category, and sort order.

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Aiptasia ARTICLE

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.

Reefapedia 4 min read
Aiptasia
Vermetid Snails ARTICLE

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...

Reefapedia 4 min read
Vermetid Snails
Red Planaria Flatworms ARTICLE

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...

Reefapedia 4 min read
Red Planaria Flatworms
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
Zoanthid-Eating Nudibranch
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
Christmas-Tree Hydroid
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
Myrionema Hydroids
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
Hydroids
Waminoa Coral Flatworms (Waminoa spp.) ARTICLE

Waminoa Coral Flatworms (Waminoa spp.)

Waminoa are small flatworms that sit on coral tissue and can create chronic irritation, shading, and reduced extension when populations build up. They are...

Reefapedia 4 min read
Waminoa Coral Flatworms (Waminoa spp.)
Bearded Fireworm (Hermodice carunculata) ARTICLE

Bearded Fireworm (Hermodice carunculata)

Bearded fireworms are not the same thing as ordinary bristleworms. They can sting, irritate coral, and sometimes eat weakened inverts, so the right move...

Reefapedia 2 min read
Bearded Fireworm (Hermodice carunculata)
Bobbit Worm (Eunice aphroditois) ARTICLE

Bobbit Worm (Eunice aphroditois)

Bobbit worms are hidden ambush predators that live deep in rock or sand and can cause strange fish, snail, or crab losses. They are...

Reefapedia 2 min read
Bobbit Worm (Eunice aphroditois)
Coral-Boring Spionid Worms (Spionidae spp.) ARTICLE

Coral-Boring Spionid Worms (Spionidae spp.)

Coral-boring spionid worms live in or around coral skeleton and feed with paired filaments that can irritate tissue and contribute to localized recession. They...

Reefapedia 3 min read
Coral-Boring Spionid Worms (Spionidae spp.)
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