| No. | All keepers listed by when they started keeping this species. The longest an individual has been kept is 15 years, 9 months. |
| 1 | arapaimag (k: 2) since 1997-09-05 to 2013-06-24, that's 15 years, 9 months |
| 2 | arapaima since 2007-03-01 to 2009-03-01, that's 2 years, 0 months |
| 3 | NickHarris77 since 2010-03-31 to 2012-03-31, that's 2 years, 0 months |
| 4 | Redtailrob since 2020-08-01 to 2025-04-25, that's 4 years, 8 months; who writes, "Readily feeds on anything. Can be territorial" |
| 5 | Koltsix since 2024-02-27 to 2025-04-25, that's 1 years, 1 months |
| 6 | faxling since 2024-04-11 to 2025-04-25, that's 1 years, 0 months |
