On Tuesday, Patricia Santos (CONANP), Hitamar Palma Muñoz (CONANP), David Delaney (McGill Univ), and I, went for an evening dive in Puerto Morelos, looking – and listening – for snapping shrimp. We found a handful of Alpheus armatus, and here are the photos to prove it, thanks to Hitamar (Guardaparque, Parque Nacional Arrecife de Puerto Morelos)!
This species is distinctively bright red, as you can see.
They are very little, but make quite a racket.
The shrimps are found hiding in curly sea anemones, with which they have a symbiotic relationship.