They have no common because Penguins are much smaller
Okay, this question makes no sense. Swans do not have any flippers. Only seals and dolphins and animals like that have flippers.
because there are gaps between out toes water goes thru them and makes us slower swimmers. FLippers dont have gaps so it makes us swim faster.
no.
Mostly Dolphins.
http://www.kalpol.com/electronic/snapper/
Swimmers can wear fins/flippers, and paddles to assist in speed.
Mostly Dolphins.
They are webbed like the fin of a fish, alot like flippers which makes them ideal for pushing water as they move their feet to swim.
its silky smooth fur
The chick makes a sound that the parents can recognize
Their down keeps them warm.
dolphins help when the patient is swimming with it which cures them and it also makes a sound that helps people to cure.