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Across 2. The deliberate control or supervision of activities, often implemented as laws or guidelines. 3. The permanent loss of a species from Earth. 5. Relating to the sea or ocean. 7. The unintentional capture of non-target species while fishing. 9. The variety of life in a particular habitat or ecosystem.

Down 1. The ability to maintain balanced ecosystems without depleting resources. 3. A community of living organisms and their physical environment interacting as a system. 4. The practice of catching fish to a rate that exceeds the ability of fish populations to replenish. 6. The branch of biology that studies the relationships between organisms and their environment. 8. A fixed share or amount of something, in particular, the amount of fish that can be caught.