• drags funnel-shaped nets weighted down with heavy chains and steel plates over ocean bottoms to harvest a few species of bottom fish and shellfish• crushes organisms, buries them in sediment, exposes them to predators• catches shrimp, cod, flounder, and scallops

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1. • drags funnel-shaped nets weighted down with heavy chains and steel plates over ocean bottoms to harvest a few species of bottom fish and shellfish
• crushes organisms, buries them in sediment, exposes them to predators
• catches shrimp, cod, flounder, and scallops