The video shows two crabs on a sandy beach. One crab is larger than the other and has a greenish-gray body with a white underbelly. The other crab is smaller and has a red body with black spots. The larger crab approaches the smaller one and appears to be attacking it. The smaller crab tries to defend itself by raising its claws. The larger crab continues to attack, and the smaller crab eventually gives up and lies on its back. The larger crab then walks away, leaving the smaller crab motionless on the sand.