rhizophora

Vivipary

Whales exhibit vivipary, meaning yes they are born live. Sharks however, exhibit ovipary, ovovivipary, and vivipary. Ovipary means they lay eggs. Ovovivipary means that they produce eggs that then hatch inside the mother who then gives live birth.

Mammals are viviparous (which means bringing forth live young which have developed inside the body of the parent)

Hyena are mammals

No fish give birth in the same sense that mammals do. However, many sharks, as well as guppies bear live young through a process called vivipary. There are many different forms of vivipary but the concept is the same. The male copulates with the female, embryos develop inside some sort of egg-like sac inside the mother into young fish, and live young emerge from mother fully functional