Snap goes the turtle
The irregular outline of the turtle’s head and feet help to camouflage it. It stays so still that algae grows on its heavily-built carapace, rendering it nearly invisible to its prey.
A red, worm-like appendage on its tongue acts as a lure to attract prey while it lies in wait with mouth agape, ready to ambush any worm-seeker that comes within range of its crushing jaws.
As its plastron (lower shell) is too small, it cannot withdraw its head into its shell like most turtles.