Well you don't have groups listed below, and I'm not sure what you mean by groups anyway, but for kingdoms I believe all mammals are warm-blooded.
Mammals & birds.
The animal you are referring to is likely the octopus. Octopuses belong to the class Cephalopoda, which includes other creatures like squids and cuttlefish, as well as snails and slugs in the class Gastropoda. They are known for their long tentacles, intelligence, and ability to change color and texture.
No, myriapoda are not vertebrates. They are a subphylum of arthropods that includes creatures such as millipedes and centipedes, characterized by their elongated bodies and numerous legs. Vertebrates, on the other hand, belong to the subphylum Vertebrata, which includes animals with a backbone, such as mammals, birds, reptiles, amphibians, and fish. Thus, myriapods and vertebrates are fundamentally different groups within the animal kingdom.
There are few jobs where you will be able to travel around the world helping or saving sea creatures. Some animal activist groups have positions that may entail this. If you were a marine biologist you would be able to as well.
there are many myths on unicorns that portray different feelings about these creatures, but I personally believe that unicorns do travel in groups due to the possibility of more safety for naturally they are peaceful creatures.
No, as mermaids do not live; they are creatures of fiction.
No - squids and reptiles belong in completely different groups of the animal kingdom. Squid, cuttlefish, and octopus belong to a phylum called cephalopod mollusks.
I belive that's all of the groups... ----
I believe that they are social creatures. You always see them in groups.
vertebrates and invertebrates
pillow insect
The echidna is a solitary animal and not usually found in groups.