1 Back problems. 2  Spine problems in the back near the lower ribs can pinch the nerves that travel through the groin area and cause groin and thigh pain. 3  Spine problems include a herniated disc or lumbar narrowing (stenosis).
Fish diets are determined by which organisms are readily available in the fish's habitat. Some larger fish eat smaller fish and sometimes are cannibalistic, eating smaller fish of their own species. Catfish in the wild swim along the bottom of rivers and eat dead fish, animal feces and just about anything they can find. Learn more about Fish
Live Foods. Wild goldfish will eat any kind of bugs they happen upon, as long as they can swallow them. You can offer your goldfish live or frozen foods that are similar to their natural diet. Daphnia, also known as water fleas, are a favorite, as are mosquito larvae, bloodworms and tubifex worms.