Soft and flexible but keeps its shape

Fish with a skeleton made soft and flexible yet keeping its shape

sharks, rays, agnathans

Cartilage

"skin"

"teeth"

fins, skin, no swim bladder, gills

Chondricthyes fins are...?

Creatures that eat things that are found on the ocean floor such as benthic animals

Cover for a sharks gills

Breathing holes on top of their body

Can be round, triangular, or diamond-shaped

What is social?

flips sand on its back, its venom, sharp spines,

Majority of most rays

sting rays, eagle rays, and electric rays

swims in the open ocean, uses its huge mouth to catch plankton and other debris, filter feeder, docile, doesn't have a stinger,

3,000

22 feet wide

name sailors gave to manta rays

creatures that clean up the ocean and river floors by eating microscopic creatures and debris

where certain fishes and sometimes shrimp clean the teeth or bodies of the fishes that have come to be cleaned

about 40 different species, battery-like electric organs on both sides of their head, lethargic, live near the shore in sea grass beds

whip-like tail, have a stinger, pointy snouts, diamond shaped bodies, flap their fins to swim, bottom feeders, swim at the surface of the ocean, prefer to swim in groups

long body like a shark, mouth, nares, and gill slits on the underside of its body, larger pectoral fins, hasn't been studied much.

animals that don't swim but scurry, crawl, hop, scoot, burrow, or slither across the bottom of a body of water

Similar to stingrays, but they tend to be smaller with shorter, thicker tails, don't have stingers, depend upon the special thorns on the edges of their tails to deter predators, also have extra set of fins, lay eggs instead of being ovoviviparous

Number of species of sharks

Most common attackers of people or boats

How to sharks eat their food?

Do sharks eat 3 meals a day?

Enormous shark that is now extinct

Nerve receptors used to find food because they sense electricity in the water

Every animal in the water gives off _____________ which a shark or ray can detect

2/3 of a a shark's ____________is devoted to smell

Difference between shark and dolphin in the water

Takes almost 2 years for _____________to develop and emerge from its mother

Shark pups will eat 'what' in the mother shark due to its innate ability to prey

Shark eggs are contained in these "egg cases"

Has a flattened head, able to make tight turns and great ability to sense prey

What should you NOT do in the water to avoid a shark attack?

Snake-like creature that wanders about on the ocean floor. They cut their victim by rubbing teeth back and forth against the skin and then sucking the blood from their victim

"without a jaw"

When an animal is born in fresh water but lives its adult life in salt water

Looks like a giant earthworm - uses its tongue teeth to nip pieces of flesh from its victim; it is a scavenger; no backbone; ties itself into knots; uses sense of smell and touch to find food