BBC1 年
Lemon shark
Lemon sharks are viviparous, in that they give birth to live young, so when a pup is born it is already a fully formed miniature shark ... no parental care from its mother, the vulnerable pup ...
来自MSN2 个月
Do sharks lay eggs? Here's how the fish gives birth and what some eggs look like.
Each has its own unique habitats ... of Natural History reports. Lemon sharks, bull sharks, mako sharks and blue sharks are among those that give birth to live young. The remainder of sharks ...