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The speed of motion in air is faster than in water because of drag force. The drag force is proportional to density of the fluid. The animal jumping out of water will feel almost no drag, since the air density is 1,000 times less than water density. Usually animals gain thrust for the jumping as how they lift themselves underwater.
Regardless of size of the animal, at any particular speed, maximum possible lift is proportional to (wing area) x (speed) 2. Dolphins and whales have large, horizontal caudal hydrofoils, while many fish and sharks have vertical caudal hydrofoils. Porpoising (seen in cetaceans, penguins, and pinnipeds) may save energy if they are moving fast.
A species of mudskipper (Periophthalmus gracilis)Fin and flipper locomotion occurs mostly in aquatic locomotion, and rarely in terrestrial locomotion.From the three common states of matter — gas, liquid and solid, these appendages are adapted for liquids, mostly fresh or saltwater and used in locomotion, steering and balancing of the body.
Most fishes generate thrust using lateral movements of their body and caudal fin, but many other species move mainly using their median and paired fins. The latter group swim slowly, but can turn rapidly, as is needed when living in coral reefs for example. But they can not swim as fast as fish using their bodies and caudal fins. [1] [2]
As one of the fastest species in the ocean, they offer acrobatic flips, fast runs, and strong fights, which all greatly entertains anglers. Traditionally, the sharks are hooked through the use of chum and baitcasters; however, fly fishing for them has become more popular, particularly in San Diego , California , where one of the three known ...
Because fluids are easily deformable and move in response to applied forces, efficiently locomoting in a fluid medium presents unique challenges. Specific morphological characteristics are therefore required in animal species that primarily depend on fluidic locomotion. Because the properties of air and water are so different, swimming and ...
The ostrich is the fastest bird on land, as well as the fastest running animal on two legs. [51] [52] The highest reliably measured running speed for ostriches is 61 km/h (38 mph), obtained by speedometer reading when a car was chasing an ostrich in a straight line chase to force it to move as fast as it could. [53]
During scientific surveys with relatively fast-moving surface nets, they are caught in more than 60% of the tows (less in slow-moving tows, likely because of their ability to avoid them). [2] Studies show that densities locally can be as high as 1 individual per 19 m 2 (200 sq ft) in the oceanic species, [ 8 ] and 120 individuals per m² (11 ...