I know they carry diseases which can harm or kill the animal it is attached to. These diseases can taint the meat of the animal so it wouldn't be wise to eat it which stinks if the animal is bread for eating. They can also irritate the skin and cause rashes, or even eat the flesh of the animal away.
I think the answer is compound.
Answer:
Mitochondria- Creates energy in the form of ATP
Lysosome- Removes waste and can destroy the cell in a process called apoptosis.
Golgi- Transport proteins synthesized by the cell
A group of dolphins is called a pod. This is the same for whales.
