Sponges use the flagella to move when they are larvae. It’s a cell that has three basic parts: flagella, collar, and cell body. Those flagella are part of a cell called a choanocyte. Most sponges are hermaphroditic (male and female cells exist in one animal) and reproduce sexually by releasing spermatozoan into the water current to be carried to other sponges, where they interact with eggs. Sponges may have been the first multicellular animals. But they are animals – despite not having the body parts that we normally associate with animals. Is a sea sponge an animal or plant?īecause of their appearance, sponges are often mistaken for plants. Sponges get food by straining the water that comes through their pores. All animals need food, water, and oxygen to survive. But sponges are animals because they must take in food, and they are multicellular. Sponges don’t look or act like most animals you know. 9 What is the lifespan of a sea sponge?.
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