Seahorses live around the world in tropical and temperate seas. Most of themfrolicin the moderately temperate seas around Australia and New Zealand, but also offthe European Atlantic coast, in the English Channel and in the mouth of the Thames.
Butwait a minute! What even is aseahorse? What is it related to? Wheredoes itcome from?
The origin of the "horse" part of its name is understandable —at least at first sight. But from the neck down, its similarity to its equine namesakeends. The body of the seahorseappears fragile andthe rear end of the tail is more worm-like.
In the broadest sense, seahorses are fishwithout scales. Instead of scales, they have tender skinthat stretches over ring-shaped, bony plates. Each species has a certain number of these rings. Together with the pipefishesand seadragons, seahorses form the family of Syngnathidae.
Seahorses are bad swimmers
In terms of swimming skills, they do not have much in common with fish:Seahorses are extremely bad swimmers. But you can't blame them for that, because they are in an upright position in the water, which means they aren'tstreamlined.
As if that weren't enough, they completely lack the tail fin typical of fish. To move forward, they use the dorsal fin, and the fins on the left and right serve as control.
With a maximum speed of 1.5 meters per hour (1.6 yards per hour), the seahorse species Hippocampus Zosterae is the slowest fish in the world. By way of comparison, some snails can reach 3 metersper hour (0.003 km/h).
With a body length of 4centimeters (1.6 inches), the dwarf seahorse is one of the smaller members of the sea needle family. But theycan be even smaller. There are even seahorses that measure just 1.5 centimeters. Larger specimens, on the other hand, have abody length of 35 centimeters.
Color change during "love dance"
There are seahorses in all different colors of the rainbow, especially red, orange, yellow, green andgrey, and many have patterns, like stripes and dots and funny wiggles.The little guys can even change their color when they want to be hidden.
But not only then.Every morning at sunrise, females swimto the males and invitethem to dance: They change colour, turn in circles, and swim together through their territory, their tails closely entwined. Enchanting, right? Then the couples separateand each individual seahorse devotes itself to its own daily routine —which primarily involves eating. But more on that later.
Dad's pregnant!
Seahorses also dance during the mating season. When seahorses perform their love dance, both take on the same color. This shows that they belong to each other. Oh, how sweet!
This courtship behavior usually lasts several days. They hook their tails together —biologists believe that this is how seahorses coordinate their reproductive cycle.
The male is then able to fertilize the eggs immediately when it receives them. During mating, the female seahorse injects up to 2000 eggs at once into the male's pouch. That's right —seahorse males carry out the pregnancy, which lastsabout nine to 45 days.
On the big day, between100 to 1,000 lively seahorses are hatched.Butseahorses are on their own after their birth, as their parents are usually busy with the next mating. Less than 0.5%of small seahorses reach adulthood.
Good night and hold on tight ...
So they don'tdrift away into scary placeswhile sleeping, seahorses hold on to plants or corals with their tails. That's also how they wait for their prey. Seahorses are typical lurkers —they simply have no other choice. After all, they aren't particularly fast and certainly not terrifying or even equipped with a good set of teeth. In fact, they don't even have teeth.
Always hungry
So they wait patiently and well-camouflaged until potential prey swims pasttheir mouths. Usingthis tactic, about 3,000 small crustaceans, floating shrimps, water fleas or fish larvae are consumed per day. Seahorses use theirtubular mouth to suck in their prey at lightning speed and swallow it, makingthe clicking sound characteristic of seahorses.
And so it goes on. Seahorses spend up to 10hours lurking because they are always hungry. Seahorses have no stomach, which means that they have to eat all the time because the food goes right through theirdigestive system. What a life!
Seahorse trade threatens the species' existence
But although they can camouflage themselves quite well,they aren't safe from humans. The seahorse business is booming.
The animals are dried, ground and eaten in soups, teas and rice wine. According to traditional Chinese medicine, this helps with potency disorders, shortness of breath, asthma, pain and incontinence.
In addition, there are over 20 million seahorses a year that end up as by-catch in fishing nets.
Although international trade has been prohibited since 2004 by the Washington Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), even today dried seahorses still fetch between $600 and $,3000 (€540-€2,700)per kilogram at markets in Bangkok or Hong Kong.
Read more:An appetite for dried seahorse in China could spell the marine animal's demise
