The largest reptile in the world is the saltwater crocodile, generally 13 to 18 ft. long and weighing up to 2,200 lbs. Females are smaller, usually 7 to 11 ft. and 1,000 lbs.
Possible causes of anemia include: 1  Certain medicines. 2  Destruction of red blood cells earlier than normal (which may be caused by immune system problems) 3  Long-term (chronic) diseases such as chronic kidney disease, cancer, ulcerative colitis, or rheumatoid arthritis.
Anemia may be caused by blood loss, destruction of red blood cells (hemolysis), or decreased production. In severe blood loss anemia, red blood cells are lost, but death usually results from the loss of total blood volume, rather than from the lack of oxygen caused by loss of red blood cells.