How does hammerhead shark reproduce

An anglerfish attracts its prey with an illicium, or a fleshy growth from its head. The tip of the illicium illuminates to make prey curious — and then they are swallowed up by the huge mouth of the predator.

Anglerfish can be found almost anywhere in the world, including the deep sea. With high pressure, almost no light and little food, animals have to be especially adapted to be able to live in the deep sea. Viperfish need to make absolutely sure that they don't miss a meal — that's what the huge mouth and the sharp teeth are for.

The plaice is a flatfish — no doubt about that. The well-camouflaged fish bury themselves in the sediment. They develop so that both eyes end up on the same side of the head. Mudskippers apparently couldn't decide whether they liked land or water more.

So they compromised and chose intertidal habitats. They are definitely fish but can use their pectoral fins to walk on land. They can breathe through their skin like amphibians. Researchers believe that the flat, sideways extended head gives hammerhead sharks a higher visual field.

That helps them find their prey. The thieves disguised the shark as a baby wrapped in a blanket and wheeled it out of the aquarium in a stroller. But thanks to an alert staff member, the horn shark — called Miss Helen — is back in its petting tank. Visit the new DW website Take a look at the beta version of dw. Go to the new dw. More info OK. Wrong language? Change it here DW. COM has chosen English as your language setting. COM in 30 languages.

Deutsche Welle. Audiotrainer Deutschtrainer Die Bienenretter. Science 'Virgin birth:' How does a shark reproduce without a mate?

A lack of mate could be one reason why a shark might reproduce asexually. The term comes from the Greek words parthenos, meaning "virgin," and genesis, meaning "origin. Researchers from Ireland and the United States performed genetic tests on a baby hammerhead born in an Omaha, Nebraska aquarium in The three occupants of the tank were all females who were captured as babies and had never been introduced to a male in captivity, which is what prompted the curiosity.

The genetic tests proved that there was no "DNA of male origin" in the baby hammerhead. Female sharks are able to store sperm for months, if not years , so there was some suspicion that the mother had mated prior to be taken into captivity, but the repeated DNA tests apparently ruled out this possibility.

Note: Content may be edited for style and length. Science News. ScienceDaily, 23 May Queen's University Belfast. Retrieved November 13, from www. New research Photos taken months and even years apart by scuba However, recent research Researchers suggest that these sharks are more at risk than