"They may be slow, but seahorses can snatch fast prey because of the unusual shape of their heads. Using a microscope outfitted with a laser and high-speed digital camera, researchers from the University of Texas at Austin observed that the area around a dwarf seahorse’s nostrils created a “no-wake zone” in front of its mouth, allowing the animal to sneak up on tiny crustaceans.
Seahorses catch their intended prey an impressive 90 percent of the time, said the authors of the study, which was published in Nature Communications." - The New York Times, December 2, 2013
To view a video of a seahorse hunting a copepod visit: http://www.nytimes.com/2013/12/03/science/a-head-for-hunting.html?ref=science