spiny vertabrae?

spiny vertabrae?

Observation - spiny vertabrae?. Description: This is part of a skeleton. It looks like a section of fine spine - vertebra are visible, as are some large thorn-like hooks which are quite sharp. It was found washed up on a beach. My best guess is that it is the tail of some sort of ray - but I can'

This is part of a skeleton. It looks like a section of fine spine - vertebra are visible, as are some large thorn-like hooks which are quite sharp. It was found washed up on a beach. My best guess is that it is the tail of some sort of ray - but I can't find any images of species which match. it's about 15cm long, each verterbra is about 0.3cm and the spikes are about 0.5cm long.