My son caught this goby in Palm CIty, FL - couple of hours north of Miami on the East Coast. It was in a drainage pond connecting to the ocean - so fresh, but I'm sure a decent amount of salt. We have caught and raised up fat sleeper gobys many times - this guy is different and has a bigger appetite. It is only a few inches, but is taking out mosquito fish left and right, even if he can't swallow them whole. It also doesn't swim around much, like the fat sleepers do. It hands out at the bottom and stalks. My son thinks is may be a water cow goby. Any thoughts: