who can tell me about seahorse(like their movement )10 marks

coronet: is nearly as distinctive as a human thumbprint

dorsal fin: moves fish forward

pectoral fins: control turning and steering

eyes: each eye moves independently

reproduction: male becomes pregnant when a female, like this one, deposits her eggs into his pouch; each pregnancy lasts about two to three weeks (varies with species and water temperature); once the male gives birth, he usually becomes pregnant again right away

diet: each day a seahorse can consume up to 3,000 brine shrimp; seahorses have no teeth and swallow their food whole

species: about 35 known species exist

size: depending on the species, from 1/4 inch to a foot or more

range: found in most of the world's temperate and tropical coastal waters
On its own, a baby seahorse has a lot to contend with. On average, if the population is stable, only two of the thousands of young that a pair produces will reach maturity. Life doesn't become much easier as an adult; the seahorse must still avoid its natural predators, such as crab, tuna, skates, and rays. Storms are probably the biggest natural cause of death for adult seahorses because they tear seahorses from their holdfasts, to be cast ashore or die of exhaustion.

Place humans into the picture and the odds worsen. Because it is a slow-swimming fish, the seahorse has to rely on camouflage to escape capture. In addition, it is found in easy-to-reach coastal waters. It has few ways to avoid being caught.

Seahorses are sought after for a variety of reasons:



Chinese medicine
Chinese and other asian cultures have been using seahorses in medicine for 400 to 500 years. The seahorse is believed to cure impotency and asthma, lower cholesterol, and prevent arteriosclerosis. A delicacy in cooking, the seahorse is also thought to enhance virility.

Aquariums
Hobbyists are often enchanted by these peculiar-looking fish, and buy them for home aquariums. However, seahorses are very difficult to keep because they require live brine shrimp for food and are prone to disease in a contained environment.

Souvenirs
Dried seahorses are used to fashion keychains, jewelry, paperweights, and other souvenirs.


In addition to direct human threats, the seahorse's habitat is also threatened. Seahorses live in sea grass beds, mangroves, or coral reefs, which can be destroyed through trawling, dredging, polluting, or even intense storms.

No one knows exactly how many seahorses there are in the world. Because of this, and because of the high demand for the seahorse, conservationists are working hard to ensure this magical fish has a future.