Egg-Laying Sharks. Of the approximately 400 species of sharks, about 40% lay eggs. This is called oviparity. When the eggs are laid, they are in a protective egg case (which sometimes washes up on the beach and is commonly called a mermaid's purse).
what s the truth i am asking this b c there seems to be posts on here that say y sperm swim faster which is what we all prob have heard for the longest time but there have been some recent posts on here that state newer studies now say y sperm aren t any faster than x and they can both swim just as fast so im just wanting to know which one is true if anyone really knows thanks
Best Answer: Whales swim at different speeds depending on what they are doing. They swim faster when they are in danger than when they are not.They swim faster at the surface than in a deep dive and they swim pretty fast when they leap out of the water.Dolphins moving through the water alongside a boat have attained speeds of 39km/hour (21 knots) over short distances.est Answer: Whales swim at different speeds depending on what they are doing. They swim faster when they are in danger than when they are not.