Its poisonous spines struck Ian, 21, from Wolverhampton, on the finger.

A sea urchin clung to a ledge, its poisonous spines thrown into high relief by the light.

It could be the mark of any kind of wound from a coral scrape to breaks left by the poisonous spines of some fish.

A row of poisonous spines are found along the dorsal region which it is able to make erect when threatened.

There is an erectile spine in front of the dorsal fin, sometimes poisonous.

Care needs to be taken with them, as they have poisonous spines.

When stressed, they will flash and point their poisonous spines at any fish or hand in the tank.

And fish may have poisonous spines.

Ever watchful, Goire stood conscientiously next to the child, steering him away from the ones with poisonous spines.

It has lost nearly all its muscles and become thin and whip-like, sometimes with a poisonous spine at the end.