They're referred to as a pod.
a pod of whales
A litter
a swarm
A blessing.
Breakout groups are called sects.
A group of Penguins is called a "waddle" A group of Penguins is called a "waddle"
A group of caribou is called a herd. Reindeer are also grouped in herds.
Some small whales are called dolphins, but small whales are still whales.
One hundred whales are called school of Whales.
One hundred whales are called school of Whales.
One hundred whales are called school of Whales.
The proper term for a group of stars is "asterism". They can also be known as a "cluster" and/or a "constellation".
A group of dolphins is called a pod. If that is your question.