The Altamaha-ha is a posited aquatic creature alleged in local mythology and folklore to inhabit the myriad network of small streams and abandoned rice fields near the mouth of the Altamaha River (after which it has been named) in southeastern Georgia, United States, particularly around Darien and elsewhere in McIntosh County. No physical evidence for its existence has been reported.
Those who claim to have seen the Altamaha-ha describe it as being 10 to 50 feet in length. It is often described as having snake or eel-like qualities (being reported in waterways where ordinary-sized eel species are common) and is said to traverse the river and streams in an undulating fashion with 2-3 "humps." It is said to have a tail that is horizontal, rather than vertical, like that of a porpoise.
There have been many stories of such a creature in southeastern Georgia (and a smaller number of similar reports in Florida) going back to at least the 1700s. The local Tama Indian tribe has legends of a giant, snake-like creature inhabiting the waters of and near the Altamaha River that presumably pre-date English settlement of the Georgia coast.
Within the science of cryptozoology, some have speculated that the Altamaha-ha may be an oceanic cryptid which engages in reproductive spawning in the fresh waters in and around the Altamaha River. However, no physical evidence for its existence as a real creature has been reported.