Luzon Island, Philippines This channeled tun (Tonna cepa) is
about two inches in shell length, with its long siphon (for
respiration) and tentacles (with eyes at their base) clearly
visible. Tuns are known for their thin shells. They are night
predators and are usually seen in sandy areas, feeding on
bivalve molluscs (clams, oysters, mussels and scallops) and sea
cucumbers. Jeffrey N. Jeffords (photographer; copyright holder;
identification) This work is licensed under a Creative Commons
Attribution-NonCommercial-NoDerivs 3.0 Unported License. To cite
this page: Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S.
Hammond, and T. A. Dewey. 2013. The Animal Diversity Web
(online). Accessed at http://animaldiversity.org. Disclaimer:
The Animal Diversity Web is an educational resource written
largely by and for college students. ADW doesn't cover all
species in the world, nor does it include all the latest
scientific information about organisms we describe. Though we
edit our accounts for accuracy, we cannot guar