They do, in order to make their task easier. The angler fish, for example, has a fleshy growth dangling from its forehead in front of its jaws. This is a form
of visual communication which deceives smaller fish into thinking that the growth is food. When the smaller fish attempt to take a bite of the growth… SNAP…the angler fish gobbles them up!
Those of you who have seen gulls near the beach would have heard them communicating by screeching at each other. In a colony of gulls, all the little 
chicks will be crying at once and a mother gulls learns to identify the call of her own chicks.However, gulls use body language a lot in order to communicate with each other. The position of the head, and the way it stands, signals a gull’s intentions. An upright posture indicates that it is likely to attack. Sometimes, a gull will lower its head and pull at grass when it is feeling aggressive.
Elephants have many ways of communicating with each other. They use the trunk, the ears, the tail, body language and naturally their voices too.The 
way an elephant holds its trunk tells other elephants whether it is going to attack or defend itself. Elephants also touch and smell each other with their trunks to find out where the other elephant has just been, what it ate and how it feels. Elephants are capable of cornmunicating through their senses and through smells. They express joy and excitement by flapping their ears. The sound of ears beating on the skin is picked up by other elephants as a message to get in touch. The elephant’s tail is used to probesorroundings which they cannot see.Elephants can communicate with each other over great distances using their voices and hearing. Fellow elephants who know each other with quiet rumbling or purring which reminds one of a running diesel engine. Calves bellow loudly for their mothers when they feel lost. Anxious, attacking and attacked elephants It is also known that elephant’s converse over great distances using infrasound which are low frequency sounds that human beings cannot hear. So, the next time you see an elephant standing frozen, with its head raised and ears sticking out, don’t disturb it…it is listening to a message that you cannot hear!
Experiments conducted by scientists seem to prove that dolphins do have a sort of language of their own. Dolphins appear to communicate with each 
other using an assortment of squeaks, whistles, and clicks. It is thought that they are warning each other of danger or if Food is nearby, but we are not yet certain exactly what they are saying. Some scientists have also discovered that dolphins can be trained to understand quite complicated commands given to them.
When a honeybee finds a big garden of flowers brimming with honey, how does it let its friends know about it? It hurries back to the hive, and does a
little dance!Honey bees communicate with each other by dancing. The purpose of the dance is to alert other bees where nectar and pollen are located. The dance explains direction and distance to The honey bee performs two types of dances…the round dance and the waggle dance. The round dance is performed for food sources close to the colony and the waggle dance used for food sources that are far Other bees attending these dances somehow-no one knows exactly how- learn the distance, direction, and odour of the flower patch. Once they have this information, they too fly directly to the flower patch in search of pollen and nectar
If you have seen a peacock spread out its feathers and dance, you will agree that it is a magnificent sight. But have you ever thought why it does this? 
The reason is quite simple… it wants to attract the female of its species which is known as a peahen! Dancing by the peacock is also an act to impress the peahen in front of him
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