Neon green Psammocora discovered living as a rollolith in Australia

A couple of neon green Psammocora have just been discovered to be living unattached, as free living coral colonies known as ‘rolloliths’.¬†Psammocora is just the latest stony coral genus to be documented living as a rollolith, a growth form in…

Coral rolloliths can occur in really unexpected species

We tend to think of most corals as being stationary, one-sided colonies of creatures but in some habitats, an abundance of corals occur as living tumbleweeds. When colonial corals occur as unattached rolling living rocks they are called ‘rolloliths’ –¬†while…

Endless Goni – a tumbleweed Goniopora breaks the rules of attachment

A coral by and large is a colony of polyp animals that is attached to the reef – it sits there, grows onto the reef, sometimes it breaks off but it’s supposed to re-attach or at least stabilize itself. Not…