They produce narrow-band high-frequency sound to help them navigate in water. These high-frequency sounds are used in echolocation. Echolocation is used to identify and locate prey and also avoid the predators. Marine mammals like whales and dolphin use echolocation in different manners.
Hopefully this will help and it's what you are looking for.
Although at first it may seem like an antigen, it's a pathogen.
Heat from the air will move into the ice cream