Which organism is a small pelagic mollusk known as a sea butterfly?

Study for the IB Marine Science Standard Level Exam. Prepare with interactive quizzes and in-depth explanations. Use our resources to excel in your marine science knowledge!

Multiple Choice

Which organism is a small pelagic mollusk known as a sea butterfly?

Explanation:
Sea butterflies are pteropods, a group of small pelagic mollusks. They live in the open ocean and swim using wing-like fins, giving them a fluttering, butterfly-like appearance in the water. Among the options, the organism that fits this description is the pteropod. Sand is sediment, a piston corer is sampling equipment, and radiolarians are single-celled protists with silica skeletons, not mollusks.

Sea butterflies are pteropods, a group of small pelagic mollusks. They live in the open ocean and swim using wing-like fins, giving them a fluttering, butterfly-like appearance in the water. Among the options, the organism that fits this description is the pteropod. Sand is sediment, a piston corer is sampling equipment, and radiolarians are single-celled protists with silica skeletons, not mollusks.

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