The teacher was apparently unaware that these hydrozoans exhibit _. Yet, everyone was elated when one of the students noticed a small colonial hydrozoan growing in a part of the tank far from the location of the original colony. They had watched it carefully, and the unfortunate creature never even got to produce offspring by budding. The teacher and class were especially saddened when the colonial hydrozoan died. She arranged for daily feedings of copepods and feeder fish. Based on this, you determine that the animal must be a (n). It has a complete digestive system and a closed circulatory system, plus multiple true coeloms. It is uniformly segmented, with short, stiff appendages and soft, flexible skin. Lastly, she added some vertebratesa parrot fish and a clown fish. A marine biologist dredges up a small animal from the bottom of the ocean.
Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. First, the teacher conditioned the water. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Use the following information to answer the question.
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