They have live young and suckle them.
Dolphins are mammals and, with the exception of monotremes, all mammals give birth to live young.
Dolphins are sea creatures but they are also mammals like whales.
Dolphins, being mammals, are warm blooded.
Being mammals - they reproduce the same way humans and other mammals do - by the male inserting his penis in the female's genital opening.
Fish use gills, but whales and dolphins are mammals. They need to surface to take a breath of air periodically.
Mammals have hair and nurse their young. That's what makes them mammals.
Chips are not mammals -they are pieces of potato.
yes
Yes
Yes.
a pod
All mammals have backbones (Spines). This is part of what makes them mammals.