| No. | All keepers listed by when they started keeping this species. The longest an individual has been kept is 17 years, 0 months. |
| 1 | arapaimag since 1996-07-22 to 2013-08-21, that's 17 years, 0 months |
| 2 | arapaima since 2007-03-01 to 2009-03-01, that's 2 years, 0 months |
| 3 | Freakdaddy since 2007-07-29 to 2012-01-11, that's 4 years, 5 months |
| 4 | RickieH since 2007-11-02 to 2009-05-02, that's 1 years, 6 months |
| 5 | headbanger_jib since 2010-08-16 to 2012-08-16, that's 2 years, 0 months |
| 6 | Seagirt since 2011-02-03 to 2013-12-27, that's 2 years, 10 months; who writes, "This guy eats like a pig. Don't leave any large rosey barbs hanging around. They will disappear rather quickly. Other than that, he's a fine cat that gets along well with others his size as long as he has a place to escape to from time to time." |
| 7 | Redtailrob since 2012-03-15 to 2023-03-13, that's 10 years, 11 months; who writes, "Aggressive & Territorial. Needs a large swimming space. Co-inhabitants must larger & capable of looking after themselves. Cannot be kept with other Sperator once over 150mm" |
| 8 | CichlidMatt since 2012-05-21 to 2012-05-23, that's 0 years, 0 months |
| 9 | NI7S2S0AN (k: 4) since 2017-08-21 to 2019-08-27, that's 2 years, 0 months |
| 10 | Fishmandavew (p: 2) since 2018-03-19 to 2018-04-23, that's 0 years, 1 months |
| 11 | mcaquatic since 2020-01-11 to 2022-01-11, that's 2 years, 0 months |
| 12 | naturenerve since 2021-05-10 to 2023-05-10, that's 2 years, 0 months |
