A commom sight here in Utila! The dark colored fish in the photo is a Bar Jack (Caranx ruber). This fish makes its living as an opportunistic feeder. In this instance, it is swimming a little above and behind a Southern Stingray (Dasyatis americana) hoping to snag a free lunch.
The stingray finds its food by rummaging in the sand, looking for little creatures to eat -- worms, small clams, tiny crabs, and such. To locate its prey, it fans away the top layer of the sand by fluttering the wing-like tips of its body disc.
The crafty Bar Jack follows closely, letting the stingray do the excavating. If the stingray uncovers something that looks tasty to the Bar Jack, the jack will snatch it in a lightning strike, then resume its position keeping watch over the stingray's shoulder, as it were. ^ Words by Bobbie & Jerry @therightblue.blogspot.com
The Bar Jack that I saw yesterday got a little too complacent and gave far too much distance between itself and the Ray. This alowed the Ray to take advantage by swimming away at speed and therefore managing to shake this pesky food thief! I'm sure it can be a bit of a nightmare having you're food stolen from you... @mydivemylife
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