Tubifex worms are related to earthworms. They live on the bottom of freshwater rivers and ponds. The worms keep their head in the mud and their tail wave in the water.
photo credit: Carol Sevilla
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| Tubifex worms are related to earthworms. They live on the bottom of freshwater rivers and ponds. The worms keep their head in the mud and their tail wave in the water.
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