Fish Remember Things

We all know fish as aquatic animal with awesome colors but with very very small memory; except Dolphins.
Fish size ranges from 8 mm (just over ¼ of an inch) long stout infant fish to 16 m (51 ft) whale shark.
Fishes may be clever than we thought , fishes are believed to have three-second memory until a new study has suggested they can remember things for up to five months.
Researchers at the Technion Institute of Technology in Israel have carried out the study and found fishes have hidden depth and can recall information for up to five months.