In this text, see tiny molluscs grasping a stone, or find out how quickly a water snail grows by counting the water rings on its shell. From beneath the surface of the water to the surrounding plant and animal life, this is a guide to the natural world of the pond and river.

In this text, see tiny molluscs grasping a stone, or find out how quickly a water snail grows by counting the water rings on its shell. From beneath the surface of the water to the surrounding plant and animal life, this is a guide to the natural world of the pond and river.