Mature live specimen. Locality: Lanzarote (Canary Islands), sheltered bay just S. of Orzola (29°13' 8.61"N, 13° 26' 29.70"W). Pool connected to sea, but closed off by lava rocks; sheltered, no big waves apart from tide and current. Coarse sand with lava rocks, samples taken 50 meters from shoreline (October 6, 2011). (Scalebar = 500µm)`