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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.
What else can I help you with?
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
Are there jellyfish in the Amazon River?
Jellyfish need to live in the sea, not in a rainforest.
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
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.
Does jellyfish need water?
Yes.
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.
What do box jellyfish need to live?
food
What is 1 basic need of the jellyfish?
Water....
