Adelaide school students helping bring endangered fish species back from brink of extinction

The students play a vital role in bringing the fish populations back to a healthy level.  (Supplied: Simon Goodes)

At a dam near Murray Bridge in South Australia, anticipation is building as three schools from opposite sides of Adelaide gather to release dozens of rare little river fish. 

"I think all the children felt like surrogate parents because we'd reared them from little dots," said Kerry White, the principal of Holy Family Catholic School.