Recent Examples of hydroid from the Web
Some grow algae and hydroid gardens on their backs, others can change color at will, and one, the decoy scorpionfish, has a lure on its dorsal fin that resembles a tiny, swimming fish.
The nudibranch, besides using the hydroids for habitat, regularly consume its home colony’s polyps.
In the wild, these slugs are known to feed on hydroids, an invertebrate marine organism.
Fourteen of the slugs made a beeline for the hydroid that had been fed, according to a study published recently in Biology Letters.
In shallow waters of the Mediterranean and along the Atlantic coast of western Africa, C. peregrina lives on and near corallike colonies of polyps called hydroids.
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