First record of the basslet Gramma dejongi outside of Cuba
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KeywordsMaximum Size Original Description Sibling Species Oceanic Ridge Trinidad
The Little Cayman specimen was 60 mm in total length, exceeding the maximum size reported for the species (i.e., 45 mm, Victor and Randall 2010). The individual was found at 18 m on a spur-and-groove formation 1.5 km east of the Bloody Bay Marine Park. We located the same G. dejongi individual in August 2013 at the exact site where it was first observed, suggesting the species is highly site-attached. Like G. loreto, the Little Cayman G. dejongi specimen was repeatedly observed upside down. Our observations indicate that second-hand reports of smaller size and vertical-swimming behavior in the original description of G. dejongi may not be diagnostic (Victor and Randall 2010).
The discovery of a single G. dejongi individual in the Cayman Islands does not imply that large-scale recruitment of the species has occurred in the area. However, sighting G. dejongi outside of Cuba does suggest that the species is capable of dispersing pelagically to nearby islands.
The authors would like to thank S. Bejarano for her insightful comments.
- Victor BC, Randall JE (2010) Gramma dejongi, a new basslet (Perciformes: Grammatidae) from Cuba, a sympatric sibling species of G. loreto. Zool Stud 49(6):865–871Google Scholar