She wrote of going back day after day to spy on one of the ocean’s weirdest partnerships. She watched for hours as a pistol shrimp worked away, digging out a burrow big enough for two families. But the other resident of this communal den wasn’t a shrimp or another crustacean or even a fellow invertebrate. It was a goby, a small ray-finned fish who relied on his shrimp partner to dig out and maintain their den. The shrimp is a great digger but is almost blind. The goby stands watch outside their shared burrow, catching food for them both. The shrimp constantly feels for the fish with long
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