Marcus, 1962) Hexabranchus morsomus, also known as the Caribbean Spanish Dancer,[3] is a species of sea slug, a marine mollusc in the family Hexabranchidae.

[4][2] It occurs in the Caribbean Sea including waters around St. Kitts and the Netherlands Antilles,[5] and has also been identified in Honduras, Panama, Costa Rica, Venezuela, St. Lucia, Martinique, Antigua, Grenada, St. Vincent & the Grenadines, Trinidad & Tobago,[3] Aruba, Puerto Rico, Virgin Islands, Sint Maarten.

[6] Background color is reddish with mottled white and yellow patches on the dorsum.

[6] Mantle margin usually curled up over small portion of dorsum covering white areas.

[6] Minimum recorded depth is 0 m.[7] Maximum recorded depth is 33 m.[7] Defensive behavior consists of the unrolling of the mantle margins to expose bright white areas followed by swimming by contracting the body and mantle margin.