It depends on the dolphin breed. Sorry I couldn't be very specific.
A baby dolphin weigh about 300 pounds
A newborn humpback whale can weigh up to 3-4 tons.
Dolphins are mammals, so a newborn dolphin eats its mother's milk.
It weigh 50 pd
big
4.5lb
alot
The mother feeds the newborn dolphin milk from mammary glands near her anal opening.
A newborn Panda is the size and weight of a stick of butter.
About 350 pounds.
450 pounds
not much if it's a baby