The Singapore Oceanarium is three times bigger than the S.E.A. Aquarium, and it will offer plenty to sea and do when it opens on 24 July.

A female blanket octopus has to be up there as one of the most spectacular sea creatures to see alive in the wild. Growing to the length of an adult human, they trail an iridescent rainbow skirt as ...

Blue-ringed octopuses carry a killer concoction called tetrodotoxin (TTX), a potent neurotoxin that can paralyze living things, including humans. Tetrodotoxin is most famously known from pufferfish — ...

The most distant known example of what astronomers call a “jellyfish galaxy” has been spotted by NASA’s James Webb Space Telescope.

They’re massive, mesmerizing—and still sting after death: What beachgoers should know about lion’s mane jellyfish.