Three Little Fishies

Three Little Fishies", also known as "Three Little Fishes", is a 1939 song with words by Josephine Carringer and Bernice Idins and music by Saxie Dowell. The song tells the story of three fishes, who defy their mother's command of swimming only in a meadow, by swimming over a dam and on out to sea, where they encounter a shark, which the fish describe as a whale. They flee for their lives and return to the meadow in safety.
The song was a US No. 1 hit for Kay Kyser and His Band in 1939. It was released in the UK as a 78 by British comedian Frankie Howerd, on the short-lived UK Harmony label, in 1949. It was revived in 2012 by Ray Stevens for inclusion in his 108-song box set, "The Encyclopedia of Recorded Comedy Music".
Other recordings.
Canadian children's singers Sharon Lois and Bram recorded the song for their 1984 LP "Mainly Mother Goose"