Weird Hitchhiker. Id please

[Don_Jorge]

 

[tsouth]

Does it move or is it solid (calciferous)? Just to be clear, we're referring to the wavy brown structure, and not the snail to the right of it.

 

[clifg]

Looks like scrolling algae

Scroll Algae

Scroll Algae, (Padina sanctae crucis) or Potato Algae is a brown macroalgae or seaweed, that is common in the shallows. The algae is generally found among submerged rocks and mangrove...

www.reefcleaners.org

 

[Don_Jorge]

Finally thank you! Been driving me nuts