jawless fishes powerpoint
Post on 21-Nov-2014
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The Jawless Fishes Class Agnatha
• long, eel-like bodies• lack paired fins• cartilage endoskeleton• gill slits with no operculum
(covering)
• no jaws• circular mouths – cannot close• sharp teeth• rasping tongue – tears hole in
prey and sucks out blood and body fluids
• less than 50 species• most primitive fish• skin sold as “eelskin” leather
ExamplesHagfish: • burrow in mud• eat worms or scavenge on dead
& dying fish• have tentacles around their
mouth• protection = slime
ExamplesLampreys: • usually parasitic• great sense of smell to find prey• covered with a poisonous slime•major problem inGreat Lakes
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