Colorful Mexican Dancer Nudibranch on a red Sea Fan.  Isla San Pedro Nolasco, Sea of Cortez, Sonora, Mexico  Depth 30 feet or 9 meters

 

 

Sea of Cortez Underwater Photography Gallery - Isla San Pedro Nolasco

*The Mexican Dancer Nudibranch (Tridachiella diomedea ) was everywhere abundant on our dive in February.  We spotted this individual on a red Sea Fan (Pacifigorgia sp.), where it remained for a while, then was swept away by wave action that accompanied a building storm.  We saw no evidence that this individual was feeding on polyps, as, for example, does the Caribbean Flamingo Tongue Mollusk.