#Different animals have different external features.The external features of animals enable us to recognise and differentiate them.
# A sea horse is actually a fish. Its head looks similar to the head of a horse. It is a unique fish because it swims in a vertical position with its head up and tail down.
# Usually , birds fly in the sky, but penguins found in the Antarctic ' fly' in the water. Their wings are useless on the ground, but they help the penguins swims so fast that they look like they are flying in water.