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An Ocean Symphony
Although we often think of the ocean as a silent world, many marine animals use a variety of sounds to communicate. Whales and dolphins communicate with other family members with complex underwater squeaks, whistles, clicks, and groans that sometimes can be heard hundreds of miles away. In fact, water is a great conductor of sound. Sound vibrations travel through water just as they travel through air, but five times faster! Like land animals, marine organisms create sounds for lots of reasons. Sounds are used to attract mates, communicate danger, and scare away predators. For example, the Atlantic croaker fish makes a drumming sound by vibrating its swim bladders. Croakers use this sound to defend themselves, but it also comes in handy during mating season, when it helps them locate a mate.
Term: communication
Definition: when one animal uses signals to send information to another animal
Reasons to use it: to attract mates, scare away predators, defend territories, and communicate with family groups or other members of the same species
Types: visual, touch, sounds, electrical, chemical
Cool fact: Sharks can detect the electrical pulses of fish hiding beneath the sand on the seafloor.
Which of the following is a form of communication?
One animal biting another.
A whale keeping in physical contact with her calf.
Both
Correct!
Both are forms of communication involving touch. Although they rarely have direct contact, fish often rely on a very special sense of touch when swimming in schools. They can sense the vibrations produced by the movement of the fish around them.
Humans are the only animals that use sound to communicate.
Fiction
Many animals communicate with sounds, from a dog barking to a bird singing to a dolphin squeaking. Some animals can even make sounds that humans cant hear!
An animal's color is a form of communication.
Fact
Some animals, like goldfinches, use their vibrant yellow color to attract mates. The poisonous poison-dart frog uses bright colors to warn other animals to stay away.