balanoglossus+aurantiacus

Acorn Worm // Balanoglossus aurantiacus // **Class**: Enteropneusta **Phyla**: Hemichordata

**Location**: live in U shaped burrows on the sea bed.

**Description of habitat**: From the shoreline and down to a depth of 100 feet.

**Living Requirements**: To be in sand or mud so they deposit feed, meaning they eat sand or mud and sift threw it to find small microorganisms and organic matter for food.

**Size**: Some acorn worms can reach up to 2.5 meters but most acorn worms are a lot smaller at about 9 to 45 centimeters.

**Life Cycle**: Acorn worms can reproduce asexually or sexually. Once the eggs are fertilized the females will lay them. In some species of acorn worms the eggs will become larva, in other species the eggs will become the worm itself. Then the process is repeated.

**Facts**: Acorn worms have a circulatory system with a heart that also functions as a kidney. They also have gill like structures they use for breathing. Acorn worms are said to be the classical invertebrates and vertebrates.

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