To provide a paint for preventing adhesion of aquatic life, effective for steadily preventing the adhesion of aquatic life such as alga, shellfish and crustaceans adhering to the bottom of ships, water supplying facilities of power plants and factories and fishing gears contacting with water of rivers, lakes and ocean to cause the increase of water flow resistance and the staining of the surface and releasing little chemical substances supposed to give adverse effect on nature such as environmental pollution.

The paint for preventing the adhesion of aquatic life is composed mainly of a gelatinous polymer of a polyacrylic acid derivative obtained by the copolymerization of a monomer containing a reactive functional group. The paint chemically inhibits the adhesion of proteins derived from organisms, and changes the surface structure of the polymer at the micro level within the variation range of outdoor water temperature (about -5°C to +40°C) to physically prevent the adhesion and solidification of alga, shellfish and crustacean by so-called shake-off effect. Furthermore, the paint exhibits high peeling resistance by reacting with a reactive functional group on the surface to be coated with the paint.