Seed shrimps

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ostracoda \Os*trac"o*da\, prop. n. pl. (Zo["o]l.) An order of Entomostraca possessing shrimplike bodies enclosed in hard bivalve shells; called also seed shrimp and mussel shrimp . They were formerly referred to as Ostracoidea . They are of small size, ...