George’s documented credit on The Abyss is sculptor, as part of Steve Johnson’s XFX, Inc. crew. It is often folded into Stan Winston’s work on the film, but the NTI creature build belonged to XFX. The finished Non-Terrestrial Intelligences are translucent forms whose lighting and soft movement make them appear closer to water than flesh.
The film credit establishes where George worked, but it does not divide the individual NTI forms among XFX’s sculptors. No particular sculpt or internal mechanism can yet be assigned to him.
ILM’s water pseudopod is a separate effect. The NTIs are the creature work associated with XFX and with George’s sculptor credit.