anchor worm

anchor worm
a copepod crustacean parasite of the genus Lernaea found on fish gills. No intermediate host. Worm-like in shape and often quite large and obvious, forming ulcers at the attachment point, and inducing scratching and flashing through irritation. Heavy infestations, especially of small or larval fish, may lead to hypoxia through increased respiration. Found in freshwater fishes, particularly cyprinids in culture and as bait minnows

Dictionary of ichthyology. 2009.

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  • anchor — n. [L. ancora, anchor] 1. (ARTHROPODA: Crustacea) In Copepoda, enlarged first thoracic segment of an anchor worm. 2. (ARTHROPODA: Insecta) In Ephemeroptera, a distal fibrous knob of the egg, terminating an elongate adhesive thread coiled around… …   Dictionary of invertebrate zoology

  • Egg and anchor — Egg Egg ([e^]g), n. [OE., fr. Icel. egg; akin to AS. [ae]g (whence OE. ey), Sw. [ a]gg, Dan. [ae]g, G. & D. ei, and prob. to OSlav. aje, jaje, L. ovum, Gr. w,o n, Ir. ugh, Gael. ubh, and perh. to L. avis bird. Cf. {Oval}.] 1. (Popularly) The oval …   The Collaborative International Dictionary of English

  • lernaeiasis — anchor worm infestation (Lernaea sp.). The fish exhibits a poor appetite, moves slowly and has inflamed and necrotic tissues at the site of parasite attachment. Wounds may be invaded by Saprolegnia. Young fish can be killed by 4 5 parasites …   Dictionary of ichthyology

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