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
A Sperm Whaleâs normal cruising speed ranges somewhere around 5 to 15 km per hour. When they speed up they can swim at approximately 35 to 45 km per hour, maintaining that speed for about an hour. Males reach sexually maturity around 18 years of age, females at 9 years.