Recent studies indicate that the Northwest Atlantic, Caribbean Sea and Southwest Atlantic populations of this species are each genetically distinct from each other, and from Eastern Central Atlantic and Indo-Pacific populations (D. Chapman and M. Shivji, Nova Southeastern University unpublished data). The boundaries between each population are not yet completely defined due to sampling constraints, but the "Caribbean Sea" population includes Belize and Panama and the "U.S. Gulf Of Mexico" sample covers from Texas to south-western Florida, the boundary or transition zone will be in between Texas and Northern Belize (D. Chapman and M. Shivji, Nova Southeastern University pers. comm. 2007). Further studies are planned to obtain more samples from the Caribbean Sea. Adult site fidelity and annual homing to seamounts are known to occur in the Gulf of California (Klimley 1988, Klimley unpublished data).
No one has provided updates yet.