Ocean Environmental Art Workshop - Angela Rossen

Stinging Hydroids
Hydroids are not a plant but colonies of tiny polyps that form
waving branches with stinging cells. It is best to look only
because of the stinging cells. They attach to the stems of
wireweed seagrass, amongst algae and anywhere they can get a
hold. One can often find them on the pylons of jetties amongst
encrusting sponges.