The most dangerous deep sea creature is the Sea Wasp. A deadly jellyfish. The slightest touch of their tentacles creates a permanent rash and horrible pain. Any harder and your toast.
Piranna
The dangerous sea creature is the blue-ringed Octupus.
Another word for an underwater creature is a deep sea creature. Deep sea creatures include the cornuta, the giant isopod and the humpback anglerfish.
the nautilus was a submarine
Some dangerous deep sea creatures would include: the giant squid, frilled shark, anglerfish, and goblin shark. Most deep sea creatures pose no threat to humans as they are located at depths in which you would need a submarine to reach.
coelacanth
"Goosebumps: Deep Trouble" follows Billy and Sheena as they discover a mysterious underwater creature while on a diving expedition. As they investigate further, they uncover a dangerous secret that puts their lives in peril. The siblings must find a way to escape the creature's clutches and survive the deep sea adventure.
the most deep sea is Coral!!!
The most solitary sea creature is often considered to be the deep-sea octopus, particularly species like the Graneledone boreopacifica. These octopuses exhibit extreme solitude, spending most of their lives alone and often defending a den or territory. Females may only interact with males during mating, after which they typically care for their eggs alone and die shortly after. This solitary lifestyle is adapted to their deep-sea environment, where resources are scarce.
Queen fish
Lots of people have answered Sharks, great whites and tigers, to this question, but i can officially tell you, with experience, that great whites and tigers kill humans mistaking them for seals. It is an easy mistake to make, but the real most dangerous creature in the sea is the Sea Wasp. A jellyfish that lives so deep under the sea the air pressure could kill a human. the slightest touch of their long, skinny tentacles gives a horribly painful, permanent rash, any harder and you're toast.
It is a mythical creature, so no, it is not dangerous in real life.