Since opening in 2002, Aqua World has been trying to breed the sand tiger shark, a viviparous species whose eggs hatch inside the womb. The keepers found the rutting season for the male shark that ...

A huge variety of animals produce eggs. These help to ... and bigeye thresher sharks (Alopias superciliosus). Embryos of other sharks survive by feeding on their smaller siblings. This is called ...