Crabs aren’t usually known for their good mood. But these ones in Japan had a change of heart for Valentine’s Day.

Every year, workers at a shrimp and crab aquarium in western Japan deck out their tanks in festive Valentine’s regalia.

The theme of this year’s display is to show your love, which the crabs do with hearts made from sponge and seaweed.

The Valentine crabs will be on display through Valentine’s Day itself.