Orca, due to its hunting prowess and general aggression, though it presents very little danger to humans
The hippopotamus is reputed to be extremely dangerous to humans.
Most sea mammals are trainable. Most success has come with dolphins.
Corey Bickert
A Sea Ottier is the "smalliest" Mammal in the sea.
the most ancient sea mammal would have to be the flat fish although it is endangered.
Land or Sea?... Land Is Either giraffe, or Elephant. Sea is blue Whale.
Humans would be the most dangerous because we kill almmost everything. We make tons of animals endangered because of hunting and environment lost.
The box jellyfish is considered one of the most dangerous sea animals in the world. Its venom can be deadly to humans and can cause cardiac arrest and respiratory failure. Other dangerous sea creatures include the saltwater crocodile, great white shark, and cone snail.
A Marine Mammal .
Narwhal.
A manatee.
Piranna