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.
Blue crayfish are fairly active, even in the daytime. They spend the majority of their time scavenging along the bottom of the tank, and they will hide in the rocks and wood of the tank. Although they are not aggressive, they do view most things smaller than them as food, so be wary of what you put in a tank with them.