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
Sources vary as to how fast a platypus swims. They have been recorded as swimming and diving at a rate of about 12 metres (40 feet) per minute.The Australian Museum (see â¦ Australian Museum weblink below) states that the platypus can swim at a rate of 1 metre per second in fast-moving waters, dropping to 0.4 metres per second when hunting for food.ources vary as to how fast a platypus swims. They have been recorded as swimming and diving at a rate of about 12 metres (40 feet) per minute.