Classes
hagfish
what is class Myxini
Gas filled bladder that aids in buoyancy
swim bladder
Male pelvic fins used to transfer sperm to female
claspers
(about 360 to 400 million years ago) is nicknamed the “Age of Fishes”, because of the abundance and diversity of fishes that appeared during this period
The Devonian Period
Torpedo like body shape
Fusiform body shape
cartilaginous fish
what is chrondrichthyes
two large openings on top of their head, behind the eyes that allows skates and rays to draw water in towards their gills
spiracles
The mother will lay an egg and the pup is born from that
oviparous
(jawed vertebrates), they were large predators and the ancestors of all future vertebrates
gnathostomata
bottom-dwelling
Benthic
lampreys
system of canals in their skin that allow them to sense vibrations in the water
lateral line system
Develop from an egg inside of their mother and then born
Ovoviviparous
Bony fish
Osteichthyes
swimming (also known as nekton)
Pelagic
lobe-finned fish
what is sarcopterygii
These organs are located in a cartilaginous fish 's head and can detect the bioelectric fields generated by and surrounding living animals (muscles)
Ampullae of Lorenzini
Born alive from their mother
Viviparous
Armored fish
Placoderms
scales are circular and smooth
Cycloid
ray-finned
what is Actinopterygii
receptor organs highly sensitive to vibration and water currents
neuromasts
Most fish are ______ with external fertilization and external development of their eggs and embryos (oviparity)
dioecious
cartilaginous fish in the order Chimaeriformes, known informally as ghost sharks, ratfish, spookfish, or rabbitfishes
Chimaeras
scales have a characteristic toothed edge
Ctenoid