Rabbi Shlomo Yizhaki (AD 1040-1105) What Is The Connection?

https://biblearchaeology.org/israel-in-the-time-of-the-judges-list/3850-dagon-the-philistine-fish-god

However, in iconography Dagon is often presented as a fish-god. This depiction has survived the centuries and is quite controversial. The reason it has survived is the similarity of the name to the Hebrew term dâg, meaning ‘fish’. This connection was first popularized by Rashi, Rabbi Shlomo Yitzhaki (AD 1040-1105), author of an extensive commentary on the Tanakh. He imagined, based on this connection to the Hebrew term dâg, that Dagon was in the shape of a fish.