Leopard whipray by Mark Laita (2010).
The Rock Queen Angelfish, (Holacanthus ciliaris x Holacanthus tricolor), a rare hybrid that forms within the overlapping range of the Queen Angelfish and Rock Beauty Angelfish on occasion.
Both are found in the western Atlantic Ocean, the home of most of the Holacanthus genus (aside from species nominally placed there as newly described Pomacanthids have tended to be in times gone past). Hybrids such as these have typically been noted to occur around the waters of the Gulf of Mexico, where both are found in sizable numbers.
This particular specimen has taken on a roughly equal sharing of the contributing attributes - the shape comes directly from the Queen Angelfish, with a deeply lunate posterior quarter (dorsal and anal finnage), and the colouration coming almost entirely from the Rock Beauty, with the inky hind colouration.
Quite a gem!
