This is a blue angelfish, Holacanthus bermudensis, or a queen angelfish,
Holacanthus ciliaris but the colours of the fish illustrated are not accurate. Both the
blue and the queen angelfish hydridise with one another in the Florida keys and the
Bahamas. They live in the tropical waters of Bermuda, the Caribbean, and along the
Mexican coast and they grow to a length of about one foot.

(Fish notes by Richard Lord, Guernsey)