Dumbo Octopus. NOAA Okeanos Explorer, Public domain, via Wikimedia Commons One of the most intriguing animals in the Mariana Trench is the Dumbo Octopus. This deep-sea resident received the name due ...

Blue-ringed octopuses carry a killer concoction called tetrodotoxin (TTX), a potent neurotoxin that can paralyze living ...

The siphon isn’t only good for releasing waste. Octopuses can use it to squirt ink at predators and make a great escape [PDF]. It’s also a powerful steering tool.