Spearfisherman always tries to help the sea in any way not just cleaning the bottom from rubbish. Catching Lionfish is one of the most important ways. Invasive lionfish threaten native fish and the environment. Invasive species are capable of causing the extinction of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. Science has demonstrated that a single lionfish can reduce native marine creatures by 80% to 90% in its range within just 5 weeks.

Abandoned nets in the sea are very dangerous. Hundreds of animals can be caught in a single net and ghost nets harm coral reefs, breaking them, exposing them to disease, and even blocking the reefs from needed sunlight.

Ghost nets are also a major contributor to the ocean plastics crisis.

Sea turtles have played vital roles in maintaining the health of the world's oceans for more than 100 million years. These roles range from maintaining productive coral reef ecosystems to transporting essential nutrients from the oceans to beaches and coastal dunes. They help maintain the health of seagrass beds and coral reefs that benefit commercially valuable species such as shrimp, lobster, and tuna. They regulate a variety of other organisms simply by eating them. For example, green turtles mainly feed on seagrass.