Author: Victor & Wellington, 2013
FBname: Darwin's sanddab
Comments: Only found on Isla Isabela which has distinctive oceanographic conditions.  The island is directly over the Galápagos hotspot, recently has an active volcano, exceptionally dry, and has extensive local upwelling of colder deep water which occurs seasonally in the area.  The unusual combination of colder water and particularly light erosion sedimentation due to low precipitation and rocky shores create a distinctive habitat.  The Tagus Cove itself is a breached tuff cone and is characterized by coarse black sands (Ref. 93094).