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.
They are known as the Featherbacks, or Featherfin Knifefishes, and Knifefishes. They are found in Southeast Asia and Africa. This is a small group of knife fish, with only ten species in four genera. These fish are generally smaller fish that inhabit freshwater or brackish environments.Although they swim in a manner similar to the Gymnotiformes, they are not closely related.hese are not true knife fish, but are actually in the order Perciforms, which are the 'perches' or 'perch-like' fishes. These are the Grey knifefish Bathystethus cultratus, the Blue knifefish Labracoglossa nitida, Collared knifefish or Finscale razorfish Cymolutes torquatus, and the Jack-knifefish Equetus lanceolatus.