You can see at 0:11 seconds a copepod was dug up by the pistol shrimp, seconds after the shrimp has stunned it. The copepod lays lifeless for a few seconds on the sand while the shrimp pushes the goby towards the copepod to alert him of food at 0:18 seconds. At 0:25 seconds the goby eats the copepod. Goby 0:43 that face. Pistol Shrimp, he really do be excavating tho @ 2:01. The Goby picks up sand in his mouth @ 2:54 and then expels it through his gill covers. They do this to gather food and scavenge the sand for algae/food/copepods. At 3:32 the goby notices another fish, the blenny, coming too close and signals to the pistol shrimp to hide in the burrow. Pistol shrimp are blind and rely on the goby for protection. They almost always have one antenna touching the goby, who is ready to signal him to hide when danger is near. The goby is not effective as a burrower. They rely on the pistol shrimp to dig and burrow a den . This is a mutually symbiotic relationship.

Amphipods close up
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