Only In Italy 3 - Shark Nativity

The video introduces an unusual visitor in a shark's habitat, resembling a spaceman without typical diving gear. Safety concerns are raised for both the diver and sharks. The latest trends in aquarium decorating are discussed, highlighting wooden statues over shells. The importance of underwater lighting for display enhancement is emphasized. A shark alert prompts a warning to the diver, and the video concludes with remarks on the slow-moving aqua diver, uniquely found in Italy.

What should be turned on to enhance the aquarium display?

What warning is given about a shark in the text?