In this situation we are talking about about conflict of interests, one of the most common, the economical vs. the environmental interest.
- Regulation is necessary because without it the industries will just look to maximize their profit and neglect the environment, thus causing long term bad effects or extermination on the populations of fish, as well as disrupting and destroying the whole ecosystem.
- Competitive businesses are almost never guardians of the nature, they tend to maximize their profits, out compete the others, and have as bigger market as possible for placing their products, so instead of looking at the long term effects, both on their business and the well being of the nature, they just look to be the first on the market and make bigger profit.