0
Sharks
When many think of sharks, they think of the movie Jaws or a dangerous man-eating fish. In reality, sharks is a large group of fish that includes very small to much larger fish. Some can be harmful to man and others are harmless. To delve into this interesting and diverse group of cartilaginous saltwater fish that have sharp teeth and a bad reputation, ask your questions in this category.
5,520 Questions
What do sharks use for buoyancy?
Sharks employ a number of mechanisms to maintain their position in the water column, one is physiological in the form of an enlarged liver with a large oil content. The other ways are morphological. The pectoral fins are aerofoils (like the wings of a plane), being convexly curved on the dorsal side and flat or concave on the ventral side. As the water moves across the fin the water particles move faster and are spread further apart on the dorsal side which results in the water moving over the top of the fin to have a higher pressure than the water below, water (and air) moves from areas of low pressure to high, and so the water under the fin moves upwards, pushing the fin up. This is enhanced but the upwardly pointed snout. The other mechanism work to push the tail upwards. The spinal colum runs along the upper lobe of the caudal fin (tail fin), as the shark beats its tail side the side the upper lobe moves ahead of the lower and 'flops', as the lower lobe swings is moves in a downwards motion, as it does so it pushes the water down and so pushes the tail up
No. Well, it really depends. If it is a young weak killer whale without much protection tiger sharks with probably go for it. A big pack of killer whales and kill any thing. With that in mind, one tiger shark wouldn't probably attack a full grown whale by itself or with a group.
What is a saw shark's barbell made of?
Saw sharks have barbells, which are thin, fleshy, whisker-like organs on the lower jaw in front of the nostrils that sense touch and taste. Barbells help the shark locate their food.
What helps sharks reduce water turbulence and increase swimming efficiency?
the texture of their skin
When did the nine eleven attacks happen?
The attacks on September 11, 2001 took place between 8:46 and 10:30 a.m. eastern standard time.
4,120 pounds4,100 pounds4,200.34 pounds4,500.765 pounds
You can't. A shark wouldn't be able to eat you whole, even if it did, it's stomach acids would burn through you anyway. And if you were in really deep water, the water pressure would crush you. To avoid sharks, try punching them in the gills or poking them in the eyes. From the shark expert girl.
What happens to a great white shark when it stops moving?
Jellyfish lack buoyancy and sink to the bottom of the ocean if they stop moving.
Chopped raw and bloody fish thrown in the water with the intention of attracting sharks and triggering a feeding frenzy.
actually, sharks have denticles. denticles are very different from fish scales because they are constructed like hard, sharp teeth to help prevent any injury to the shark's body.
Most of the time the baby tooth will fall out eventually. If it doesn't seem to be getting loose, it should be removed by a dentist so it doesn't cause adult teeth to be crowded or crooked.
What sharks have a urinary track?
Mako sharks and great whites are the only sharks who have full urinary tracts. All other sharks turn thier urine into uric acid and excrete it through thier skin.
Im pretty sure they do ,But not on purpose though. They(The plankton) are so small im sure its accidental.
What does a mouse a blacktip shark a bass a hummingbird and a rattlesnake have in common?
The only one we could come up with is that they can all move very fast.
