Bony fish, boneless fish, and Amphibians Science Presentation Ms. Ana 6th Grade

Bony fish Bony fish live in oceans, lakes, and streams from the equator to the polar seas. Because of their different habitats they have different behaviors. Fish that live in open ocean have streamlined bodies, slim, knifelike, side fins and narrow, forked tails; which allows them to swim fast to catch food or aviod the predators. This fish are well camouflaged which make them difficult to see. The upper parts of their body is a metallic bluegreen, and their underside is silvery color. Many reef fish have specially shaped fins and tails that help them maneuver around rocks and reefs.

Boneless fish Catilaginous and jawless fish have no bones. Their skeletons are made of cartilage. Cartilage: is a flexible tissue that forms the skeletons of most vertebrate embryos. The cartilaginous fish are considered to be sharks, rays and skates. This fish have no swim bladders, meaning that when they stop swimming they cant stay up and they are pulled down to the bottom. There are more tan 350 kinds of sharks some of them with several rows of Sharp teeth in their jaws. The rays and the skates have flattened bodies thats why they can glide easily in the bottom of the ocean they eat small mollusks. The largest ray is called mantalives in the upper waters of the open ocean, the rays have poisonous stingers in their tails and they use this poison to defend from predators. The hagfish and the lampreys are the only jawless fish still leaving. Some lampreys are parasites that attack themselves using their suckerlike mouths.

Amphibians Most amphibians spend time of their lives in the waterand part in the land. They are vertebrates that have no covering of scales or hair on their skin. They have soft, thin and moist skin that absorbs wáter. If they have limbs, they have webbed feet with no claws. Frogs, toads, newts, salamanders, and

Reproduction of fish and amphibians Bony fish Boneless fish Amphibians Eggs of bony fish are fertilized in the wáter. Females lay thousands of eggs in the water and the males shed sperm over the eggs. Most of this eggs become foos for other fish. One fish is the sea horse which protects its eggs until they’re hatched. The eggs of cartilaginous fish are fertilized with in the female body.