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What do you know about sharks?

Across
Tiny drifting animals
a whitish or translucent membrane that forms an inner eyelid,can be drawn across the eye to protect it from dust and keep it moist.
Unable to generate their own body heat
Tough flexible tissue
Respiratory organ
filled with gas, to keep them from sinking to the bottom of the ocean, as they are usually heavier than the water that they occupy.
contains resistant calcium phosphate materials.
Gill flaps that absorb and help diffuse oxygen to the sharks blood stream
Growing or living in water
Kill or destroy large part of
Spread out or through
Down
to chase or search for (game or other wild animals) for the purpose of catching or killing
act as stabilisers to prevent the shark from rolling to the left or right.
Another name for tail fin
Sensory system that runs from head to tail on each side of the sharks body
Physical environment and the community of things that live in it
Dead body of an animal
an aggressive and competitive group attack on prey by a number of sharks