yes
The relationship between whales and barnacles is not necessary for the survival of either organism. While barnacles can benefit from attaching to the skin of whales to filter feed, whales are not dependent on barnacles for their survival. Whales have other food sources and means of maintaining their health.
yes
Whales breathe in and out of their blowhole. They are unable to breathe through their mouth because the trachea is not attached to the throat.
kids can help save whales by donating money to places that save whales
Whales breathe with lungs. Breathing helps them survive.
Krill help whales by satisfying their appetite, and a type of fish called doctor fish help clean blue whales by eating the barnacles off whales skin.
defense
Blue whales have bacteria in their intestines to aid digestion.
To help you move, skeletal muscle is attached to
humpback whales live where they live because it has LOTS of water
to help swim
They are in danger.