Q. How many species of shells are there?
A. There are more than 80,000 species of sea shells. They are different shapes, sizes and colors. Many types of marine invertebrates make their homes in shells.Q. How do dolphins comminicate with each other?
A. Dolphins produce a variety of sounds - clicks, grunts, squeaks and whistles - using air sacs below their blowhole. These sounds can be used for comminicating with other dolphins. They also use body language to communicate. Slapping their tails or snapping their jaws are examples of this. There is no evidence that dolphins (or any other whales use anything resembling human language.