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The sperm of fishes are morphologically diverse, but broad-level relationships between morphology and mating pattern are apparent (Jamieson, 1991; Stockley et al., 1996, 1997). Significant questions about the extent and functional importance of this morphological diversity remain, however.
The wrasses (Labridae) are a widely distributed, diverse group of fishes with an array of mating systems both among and within species, making them good subjects for the study of sperm morphology. The morphology of the sperm of labrids is poorly known, however, except for a few species (Lahnsteiner
and Patzner, 1997; Schärer and Robertson, 1999). The bluehead wrasse, Thalassoma bifasciatum (Bloch), and the hogfish, Lachnolaimus maximus (Walbaum), are two relatively common wrasses living on and near the coral reefs of Florida and the Caribbean. These fishes are broadcast
spawners that rush into the water column to release gametes. We describe the ultrastructure of the sperm of these two species.
The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.