Hatmehit, also referred to as "The First of the Fishes" and "Foremost of the Fishes", was a prominent Predynastic goddess in the region that would later become the 16th Nome of Lower Egypt (Mendes aka Per-Banebdjedet). She was considered a mother goddess and was originally depicted with a fish upon her head - the same fish that is reflected on the Nome’s standard which gives evidence to her prominence at some point during the early periods. Probably due to the fact that the region in which she was worshipped was predominately populated by fisherfolk (those that fish, not merfolk), texts refer to her as either a fish goddess or a dolphin goddess and the Nome itself was referred to as the Fish or Dolphin Nome.

Little is known about the details of her cult or how she was worshipped, but excavations in Lower Egypt have revealed pottery, dedicated to Hatmehit, located outside what is presumed to have been her temple. It is unknown how long she was a prominent deity independently, but during the 2nd Dynasty - when the ram cult of Banebdjedet became popular, she was alotted the status of wife of the ram-god and any prominence she may have once had steadily decreased from that point. Though only an assumption, it does seem that she faded into the background of the Ram Cult of her spouse, there is very little documentation to represent her and even in our day the resources are very slim.