A couple of tube sponges growing on a little ledge. Although it might appear that the scan is not complete on one of the tubes, in reality it was a damaged / deformed sponge.
A fairy basslet sneaked into one of the pictures, can you spot it?
21 Photos taken in Roatan, Honduras with a 15mm fisheye lens, processed in Agisoft Metashape Standard
Support the [Roatan Marine Park](http://wwwhttps://www.roatanmarinepark.org/) in their efforts to treat affected corals and protect the reef.