Causes of keratitis include: 1  Injury. 2  If an object scratches the surface of one of your corneas or penetrates a cornea, keratitis without an infection may result. 3  In addition, an injury may allow bacteria or fungi to gain access to the cornea through the damaged surface, causing infectious keratitis.
There are 5 species of stonefish that can be found in the coastal regions of Indian and Pacific oceans. Some species of stonefish live in the rivers. Stonefish lives close to coral reefs and underwater rocks. It often lies buried in the sand in the shallow water.
Facts About Stonefish. Stonefish, belonging to Synanceiidae family, is the most venomous fish in the world. When a stonefish feels threatened or disturbed, it erects 13 poisonous dorsal fin spines as a defense, but remains motionless. Researches at the Queensland Museum have put forward that stonefish have been found in the gut contents of large sharks, particularly tiger and white sharks. 2  Stonefish can be found single or in a group under rocks and rubble.