1, Chinese pond minnow is mainly divided into two kinds, one is introduced from Egypt to the Egyptian pond minnow, there is a local pond minnow, pond minnow and catfish is the most important difference is that there is a clear dorsal fin on the back, the abdomen also has fins, and the back of the fins hidden in a shadow spine, while unfolding after the comparison of a side of a triangular small fins, the catfish only exists in a small handful of dorsal fins.
2, catfish head is relatively small, generally not more than a catty, in addition is in appearance, catfish only 2 pairs of whiskers, **** 4, the top two whiskers longer below the shorter, catfish overall look is earthy yellow or yellowish mostly. While the pond fish is with 8 beards, *** 4 pairs, the body surface mainly shows black.