Extinct
Steller's Sea Cow
Bhaji River Dolphin
Endangered
Sea Otter
Manatee
dinosour
The Caribbean Monk Seal and the the Icthyosaurus are two modern sea creatures that are currently extinct but there have been many more in prehistoric times.
some
The conservation status for the green sea turtle is Endangered. There is one conservation status worse, Critically Endangered, before the green sea turtle would reach Extinct or Extinct in the Wild.
doh.. why would there be such a question as to how many endangered mammals are in the sea when not all creatures in the sea have been discovered yet!
The blue whale and the pink river dolphin.
yes and there are lots on that list.
There is no information available which indicates that the sea pen is endangered. Fossils of relatives of these creatures date back to the Cambrian Age.
there is endangered dolphins porpoises and some sharks There are also many types of beautiful fish that they have yet to name. But they are trying to keep their environment clean so that the fish can live on
Sea cucumbers are not extinct but they are protected. Many different species are over fished by Asians who find them delicious to eat. Many scientists would like to see them listed as endangered but that has still not been done (2016).
Most likely! If I haven't heard of the name, they probably are. You know what to do though, right? Try to save them (if they aren't already extinct).
Sea minks are extinct due to hunting.
the endangered sea animals are killer whales blue whales etc