ribbon worm

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Related to ribbon worms: proboscis worm, phylum Nemertea

ribbon worm:

see NemertineaNemertinea
, phylum of elongated, often flattened, marine Worms, sometimes called ribbon worms. There are 900 known species, ranging in size from a fraction of an inch to 90 ft (27 m).
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References in periodicals archive ?
Amiskwia also didn't have the common, distinctive features of swimming ribbon worms despite sharing a resemblance with them. 
Some ribbon worms will eat themselves if they can't find food.
To our knowledge, the only other marine animals known to specialize in egg predation are nemertean ribbon worms of the genus Carcinonemertes that consume the brooded eggs of decapod crustaceans (7).