Answer:

The fishermen complained that the janitor fish were destroying their fishnets with their sharp fins. The depredations of the janitor fish will have a long-term impact on the food chain in the metropolitan rivers. So delicate is the balance of life that a minor change or a new alteration in the environment is bound to ripple in the rest of the system. The national government should help Marikina empty its waters of the janitor fish and make sure no new species enters the country without rigorous study and safeguards. The bottom line is that the janitor fish should not have been allowed in the country without government clearance. It should have been kept out of public waters by our marine authorities.

Explanation: