March 27, 2011 
Goatfish, in the family Mullidae, are very unique fish that are easily identified by two separate dorsal fins and barbels, whisker-like appendages that hang below the mouth. Goatfish use the barbels to sense the small crustaceans, worms and other marine invertebrates hiding in the sand. Once a goatfish senses prey, it will swallow some sand with the prey and then expel sand through the gills. Check out this video to see a goatfish looking for prey: Goatfish Feeding
Here are a variety of goatfish I spotted in Waikiki, Hanauma Bay and other locations on the island.
Reef Watch Waikīkī 
At Hanauma Bay today I saw a blue goatfish and a cigar wrasse swimming/hunting together. It’s not the first time I’ve seen this combination and I wonder if it is an example of cooperative hunting/feeding?