Even if not dynamited or poisoned by cyanide, reefs dye because of pollution, or are buried alive by murky runoff from deforested islands. 300 m. Snails Helicostyla sp. Makahambus caves, Mindanao. Shells of land snails are seldom sought by collectors. But in the Philippines they are so beautiful, that hundreds of thousands are exported for souvenirs.
Many species are already extremely rare.
Larger snails are routinely gathered for food. Freshwater fauna is also quickly disappearing. Turtles, crocodiles, and aquatic snakes are almost extinct. Taal Caldera with Lake Taal and inner cones, Luzon - habitat of the World's only freshwater sea snake, endangered Hydrophis semperi . 15-C. lepidus .