Fish. Classification. Kingdom- Animalia Phylum- Chordata Sub Phylum- Vertebrata Classes- Agnatha, Chondrichthyes, Osteichthyes. Agnatha. Jawless fish: Lampreys, Hagfish. Types of Agnathans. Hagfish - Ocean scavengers, not much is known about them.
Jawless fish: Lampreys, Hagfish
* Both have cartilagenous skeletons and sucker-like mouths.
Cartilagenous Fish: Shark, Ray
Bony Fish: Salmon, Carp, Tuna
Over 20,000 different species
Air Bladder Operculum Lateral