This is going to be the crustacean story in the news all this week for sure...
It’s a hermit crab. His name is Harry. His is wearing a Lego shell, which is not surprising, given that he lives in an aquarium in a UK amusement park - Legoland.
This is from a Guardian story here. This picture doesn’t do justice to the accompanying video (can’t embed it, so if you want to see it, you’ll have to hit the Guardian’s website).
The article implies that the crab chose this shell over more regular snail shells. The story doesn’t make clear that the shell is not entirely Lego. In this preview image on the video (which is often partly covered by the “Play” or “Replay” icon), you can clearly see the molluscan shell that the Lego shell is built onto: