Very few. Some sights of the Blue Shark and a Long-tailed Thresher has been seen
Some sharks lay eggs on the bottom of the ocean, called devil's wheelbarrows or mermaid's purses. Most sharks give birth to live young.
It is the species Also because the have a live birth
because some sharks are different. most sharks give live birth and only about 40% of sharks lay eggs and there is 400 species of sharks.
i have no clue which species live in lakes
Some sharks,( like the White shark) live to be in their fifties. Though for most shark species the answer is uncertain.
Sharks have a great diversity when it come to their reproductive system. There are two different ways for a Shark to reproduce depending on what kind of Shark it is, there are oviparous egg laying species and viviparous live-bearing species. Oviparous species lay eggs that develop and hatch. Where as the the viviparous species are live-bearers. The Thresher Shark belongs to the viviparous species therefore do not lay eggs. I hope that answers your question. ThresherCove.com
Yes, there are still plenty of Sharks around.
Over 15 species of sharks live in Hawaiian waters. A few examples of these sharks are the bignose shark, gray reef shark, silky shark, blacktip shark, sandbar shark, tiger shark, and whale shark.According to Sharks and Rays of Hawaii by Crites and Crow, there are 40 known species of sharks in Hawaiian waters. (reefannie)
sharks are a migratory species, great whites however tend to live in the north Atlantic and the Persian sea.
Sharks can be found in all of the world's oceans, including the Atlantic Ocean, Pacific Ocean, Indian Ocean, Arctic Ocean, and Southern Ocean. They are a diverse group of species that have adapted to various marine environments around the globe.
The lifespan of a shark is around 20 to 30 years. This is in the wild, not in normal captivity.
Some species, usually the smaller ones, can exist in captivity and have for many years. Usually they are for scientific study or in aquariums. The type of water, warmth, and food must be carefully matched to the natural conditions to give the best chance for continued survival.