Section 19.3- The Cartilaginous Fish Flashcards
two classes of fish that have skeletons made of cartilage rather than bone
cartilaginous fish
all sharks, rays, and chimaeras have
jaws
cartilaginous skeleton
the skin of sharks, rays, and chimaeras is covered with toothlike scales known as
denticles
generally the most feared of the creatures that roam the oceans
sharks
sharks can be easily distinguished from most other fish by their
asymmetrical caudal fins
one of the most maneuverable sharks
hammerhead sharks
other features that make a shark different from bony fish include a
skeleton of cartilage
lack of swim bladder
complex reproductive system
a notable exception that uses its stomach as a swim bladder and retains enough air in it to keep itself buoyant for hours at a time
sand tiger shark
shark that lacks a swim bladder but has a very large liver that contains an oil that is lighter than water, helping to make the animal buoyant
whale shark
runs along a shark’s body from snout to tail and is very sensitive to vibrations
can detect vibrations from animals in the water for great distances
lateral line
the shark also brings into play one of the keenest senses of ______________ in the animal kingdom
smell
the most feared of the maneaters is the
great white shark
sharks also have excellent ______________
eyesight
unusual fish that broad, flat bodies and generaly a long, whiplike tail
rays or batoids
the two largest sharks that are plankton-eaters
basking shark
whale shark
