Aquatic Connections Multiple Choices

Catfish interact with many other species in ways that can be helpful, harmful, or neutral. This passage introduces students to relationships such as mutualism, parasitism, and commensalism through examples involving cleaner organisms, parasites, smaller fish, and aquatic plants. Readers learn how some organisms may remove parasites from catfish, while other parasites can weaken them, and how smaller fish may benefit from hiding near catfish without affecting them. The passage shows that even fish that seem solitary are still connected to a much larger web of life.

This worksheet gives students strong practice comparing different ecological relationships and deciding how each organism is affected. Academic vocabulary such as mutualism, parasitism, commensalism, parasite, and ecosystem becomes easier to understand because each term is tied to a concrete example. Students also strengthen classification and reasoning skills by determining who benefits, who is harmed, and who remains unaffected. It’s a strong final worksheet for helping students connect catfish to the broader aquatic community.