You can look anywhere like for instance try looking in a field at a cow and it has flies on it so those flies get eaten and the cranes that ate them are fed and the cows get the flies off them ( Too bad for the flies though)
Echinoderms are characterized by radial symmetry, several arms (5 or more, mostly grouped 2 left - 1 middle - 2 right) radiating from a central body (= pentamerous). The body actually consists of...