SMS 100 Lecture Notes - Lecture 21: Basking Shark, Squalidae, Acanthopterygii
Document Summary
Of the 20,000 types of sh about 60% are marine > in the ocean. The lamprey > they don"t not have a spinal cranium or jaws, some have circular mouths, they don"t have paired ns. They eat like paretics, latch onto food and luck out nutrients. Swim in freshwater streams and develop from a worm like larva for 18 years before. The hag sh > no jaw, lack actual vertebrae have gill slits down the sides of their bodies, they get so slimy that they tie themselves into knots to remove the slime. Video shown of a group of hag sh feasting on a dead whale. The reproduction process is poorly know > lay eggs. Chimaera > example spotted rat sh, don"t have scales, only have one gill. Skates and rays > have enlarged ns can span over 20 feet, can have an electric charge.