2006-06-19 12:36:20 · 11 answers · asked by anonymous 2 in Science & Mathematics ➔ Biology
Fish and sea creatures have a swim bladder. This is an organ that inflates/deflates to hold their pressure and keep them afloat.
2006-06-19 12:40:03 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Whales are composed of fat deposits. Fats are lighter then water and so serves as a natural life preserver. I had an aunt who was very much over weight and she could not touch the bottom of the deep end of the pool because of her fat. Fish on the other hand have fat but it is a different kind of fat and do not have near as much as whales.
I believe that with fish however it has a lot to do with their comparative density with water. If a fish were to have roughly the same density of the water all they would have to do is to move to keep from sinking (or rising). Some Fish might have a swim bladder but I do not think that most fish have those.
2006-06-19 13:55:37 · answer #2 · answered by Duane L 3 · 0⤊ 0⤋
Air in some form
Marine Mammals have air-filled lungs. It takes a massive amount of muscle to move a large organ filled with air deep into the compressive ocean. Air will bring the body back up and keep it buoyant.
Oxygen that fill the swim bladders in osteoichthyian fish (bony fish) allow buoyancy and depth level control. It is brought in and removed through a complex net of capillaries (rete mirabile) that control the volume of the oxygen in the bladder.
Chondricthyian (cartilagenous) fish do not have a gas bladder and will sink by their own weight if they stop moving (ex. sharks).
Then there are benthic species which live on the seabed or ocean floor. Since they live there and do not venture ofteninto the pelagic ocean areas, their sleeping arrangements in this sense is a moot point.
2006-06-20 10:09:21 · answer #3 · answered by icehoundxx 6 · 0⤊ 0⤋
Many types of marine life (specifically fish) have what is called an "air bladder." The function of this organ is to adjust with gas (either breathed from above the surface of the water or converted from water by gills) to regulate the placement of that marine animal in the water. This organ is sometimes referred to as a "swim bladder." It acts a a form of buoyancy.
2006-06-19 12:45:03 · answer #4 · answered by Brandi A 2 · 0⤊ 0⤋
particular, the perspective and degree of "sleep" varies from species to species, yet all animals have a relax era of a few variety. Of all the fish i've got run throughout, the wrasse are most of the deeper sleepers. Many species will bury in sand or wedge themselves in rock and sleep truly heavily being that they are ok hidden and guarded. different fish will proceed to be partly alert and basically loaf around interior the water column with particularly much less interest than they might in the event that they weren't resting.
2016-12-08 10:38:54 · answer #5 · answered by ? 4 · 0⤊ 0⤋
Their swim bladder is the correct answer.
Hmm... maybe that other fish eat them before they get a chance to sink to the bottom...
Actually, fish don't sleep. So there is no answer to your question.
2006-06-19 13:24:19 · answer #6 · answered by Anonymous · 0⤊ 0⤋
bony fish have the swim bladder; cartilage fish sharks, skates and rays do not; but they do have an oily liver that helps their bouyancy. There are a few sharks that actually DO go to the bottom to rest, ie horn shark, skates, rays....more than this too.
Whales have lots of blubber and lungs to help their buoyancy.
2006-06-19 14:22:09 · answer #7 · answered by gopigirl 4 · 0⤊ 0⤋
Most marine life have air bladders that allow them to maintain neutral bouyancy.
2006-06-19 13:01:39 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Most marine animals have swim bladder. But sharks dont have so they have to keep swimming to keep afloat.
2006-06-20 16:54:00 · answer #9 · answered by nobodyknowsme™ 5 · 0⤊ 0⤋
swim bladders , and oil bladders (less dense than water) like the kind found in sharks all help
2006-06-25 19:44:40 · answer #10 · answered by browning.338 2 · 0⤊ 0⤋