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every fish and bird has a streamlined body so that they can cut through the force of water and air respectively.
if fish don't have streamlined body they will not be able to move through the water.buoyancy means when a body replaces the weight of water and u get an upthrust that means the water pushes u up so that u don't sink.that's why fishes need buoyancy so that they can float/swim.
i hope this helped u.i don't know the proper definition of buoyancy but the meaning i gave u is right.
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∙ 12y ago
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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.
Do Jellyfish need to have tentacles to be classified as Jellyfish?
no
What are buoyancy compensators typically used for?
Buoyancy compensators are typically used for compensating things such as buoyancy things. These things need to be compensated very often to work properly.
How do you calculate the amount of foam you need to support a dock?
Mass of dock. Initial buoyancy. Buoyancy of additional foam.
Are there jellyfish in the Amazon River?
Jellyfish need to live in the sea, not in a rainforest.
Why do jellyfish die on beach?
I believe they die because they have no bones yet are out of the water so are crushed by their own weight. When they are in water they have a natural buoyancy so they are not crushed.
How many jellyfish do you need to catch in Jellyfish Fields?
Only in Spongebob there is such thing as Jellyfish Fields, as far as I know of.
Will people with jellyfish stings need crutches?
All people with jellyfish stings to the leg or foot will need crutches
Is the mushroom jellyfish and the spotted jellyfish the same?
becuz everything need everything
What affect provided by water aerobics helps make the exercise beneficial?
Buoyancy
Is gravity needed for buoyancy?
Gravity is needed for buoyancy as if there was no gravity then there would be no need for buoyancy, the need for buoyancy is to counteract the pull of gravity so you can stay at the surface of a liquid such as water. If there was no gravity then there would be no need to counteract it. I hope this the answer you needed. What if there is a ball of water in space and a cork made dof wood is inserted carefully into the ball. Would it 'rise' from the center of the ball towards the surface or not???
Does jellyfish need water?
Yes.
