The video shows a lobster and a crab in an aquarium. The lobster is crawling on the sandy bottom of the tank, while the crab is sitting on a rock. The lobster has long antennae and is mostly black with some blue and yellow markings on its shell. The crab is smaller and has a white shell with some brown spots. The aquarium is well-lit, and the water is clear. There are no other visible creatures or objects in the tank.