| No. | All keepers listed by when they started keeping this species. The longest an individual has been kept is 15 years, 6 months. |
| 1 | arapaimag since 1997-11-29 to 2013-06-23, that's 15 years, 6 months |
| 2 | arapaima since 2007-02-28 to 2009-02-28, that's 2 years, 0 months |
| 3 | kntrygrl4lyfe since 2008-01-22 to 2010-01-22, that's 2 years, 0 months |
| 4 | too<many>tanks since 2008-01-27 to 2011-01-27, that's 3 years, 0 months |
| 5 | amazonfishman since 2008-02-28 to 2010-02-28, that's 2 years, 0 months |
| 6 | SuperLaz since 2008-04-18 to 2010-04-18, that's 2 years, 0 months |
| 7 | necrocanis since 2008-08-12 to 2010-08-12, that's 2 years, 0 months |
| 8 | ndcp18 since 2009-09-15 to 2011-09-15, that's 2 years, 0 months |
| 9 | monsters2be since 2011-01-15 to 2013-02-12, that's 2 years, 0 months |
| 10 | Brachyplatystoma since 2015-11-09 to 2017-11-09, that's 2 years, 0 months |
| 11 | Redtailrob since 2017-04-02 to 2019-06-05, that's 2 years, 2 months; who writes, "Fussy eater to begin with and occasionally skittish." |
| 12 | Hrothgar Sørensen (p: 2) since 2017-04-19 to 2019-04-20, that's 2 years, 0 months |
| 13 | Wallagonia since 2018-12-04 to 2020-12-04, that's 2 years, 0 months |
| 14 | Rpul since 2019-02-01 to 2021-02-01, that's 2 years, 0 months |
| 15 | mcaquatic since 2020-01-11 to 2022-01-11, that's 2 years, 0 months |
| 16 | qui2424 since 2021-03-09 to 2023-03-09, that's 2 years, 0 months |
| 17 | Momma185 since 2021-10-10 to 2023-10-10, that's 2 years, 0 months |
| 18 | N_F_S since 2024-04-05 to 2024-10-17, that's 0 years, 6 months |
