It is a marine gastropod mollusc in the family Facelinidae.
[2] The holotype of this species was found at 17 m depth at Isla San Benito Oueste, 28°20′N 116°10′W / 28.333°N 116.167°W / 28.333; -116.167 on the Pacific Ocean coast of Baja California, Mexico.
Additional specimens used in the original description were from nearby Isla Cedros and Bahia Magdelana, Pacific Ocean, Mexico.
[1][3] It has also been reported from Costa Rica.
[4] Hermosita sangria feeds on the hydroid Solanderia.