It may be the most adorable sea creature ever—and seeing one face-to-face has been on the bucket list for a Japanese diver ...

The most common sea animals are those without a backbone, such as jellyfish and shrimp. There are thousands of species of jellyfish and shrimp. Some jellyfish are clear, but some have bright colours ...

Is this the cutest sea creature ever? Keen diver Yusuke Fukami fulfilled a personal dream by snapping a cartoon-like Costasiella sea slug while in Bali. He says: “One of the diving points was in ...