The mollusk crawled slowly across the sand.
A type of soft-bodied animal, often with a shell, such as snails and clams.
Scientists study the mollusk to learn more about marine life.
A term used in biology to refer to a large group of invertebrate animals.
ด้วยพจนานุกรมภาพและแฟลชการ์ดที่ทรงพลังฟรี
