Thanks to the diversification of the
reptiles, the terrestrial temnospondyls were wiped out during the Triassic. However the
aquatic and semi-aquatic forms continued to flourish and deversify.
These forms eventually became more reliant on the water. Some species
probably hardly ever left the water at all. The group diversified quite
massively, even invading completely new niches e.g. the trematosaurs. The trematosaurs are
the only know amphibians, except for one species of frog, to adapt to
life in a marine environment. The group differed not only in size but
also in the way they caught their prey. Some used crocodile like snouts
to catch their prey, while some (e.g. Capitosauroidea) sucked prey into
their huge mouths by opening their mouths quickly and sucking both prey
and water in.