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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
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
Bristleworms (Eurythoe spp.) ARTICLE

Bristleworms (Eurythoe spp.)

Bristleworms are common reef hitchhikers that usually help clean detritus, but large individuals and certain species can become nuisance pests.

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
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