I have a yellow watchman goby that is paired with a tiger pistol shrimp. It’s rare to see the pistol shrimp but the goby is outside the cave all the time. Today I saw the goby zip out and pickup a blue legged hermit crab ( tiny one) in its mouth and went into the cave. The goby came right back out to his usual spot. Did he just feed the shrimp my hermit crab?