Sea Robins (triglidae), also known as gurnards, are an interesting species with large, butterfly-like pectoral fins. They also have long “feeler” fins that they use to “walk” along the sea floor, feeling for their prey. They long bodies, typically ranging between 2.5 and 7 inches. As if their over-sized fins and walking abilities don’t make them unique enough, sea robins are also a vocal species. The produce sound using their swim bladders and a few special muscles. Don’t be alarmed if you hear these guys calling out to you!