1.   Gulls and terns are hatching young with severe deformities and high death rates.

2.   The sea horses are hatching tiny young that flit before the faces of delighted youngsters.

3.   The platypus is a monotreme, a mammal that lays eggs to hatch its young.

4.   Their nurseries, where sharks return each year to hatch their young, have also been damaged by pollution.