Methuselah (captured 1938; born as early as 1922) is an Australian lungfish residing at the Steinhart Aquarium.

[9] Due to damage incurred in the 1989 Loma Prieta earthquake, the original Steinhart Aquarium was torn down in 2005.

[11] Genetic testing was performed on Methuselah in 2023 to estimate her age by measuring DNA methylation from a sample of her fins.

[10] While similar in appearance to them, Methuselah has developed a comparatively lighter coloration over time, although it is unknown whether this is due to aging.

[6] As Australian lungfish are not sexually dimorphic, Methuselah's biological sex has not been determined with certainty.