Description: Modiolus americanus (Leach, 1815) - exterior of a right valve of the American horse mussel, 3.15 cm across at its widest. Family Mytilidae (Devonian to Holocene) - the mussels are filter-feeding, epifaunal, byssal thread attachers that principally occupy shallow to deep marine and estuarine environments. Date: 6 March 2011, 18:40. Source:
Modiolus americanus (American horse mussel) (San Salvador Island, Bahamas) 1. Author:
James St. John.
