| No. | All keepers listed by when they started keeping this species. The longest an individual has been kept is 23 years, 0 months. |
| 1 | arapaimag (k: 2) since 1990-07-02 to 2013-07-02, that's 23 years, 0 months |
| 2 | Dave Rinaldo since 2007-01-21 to 2009-01-21, that's 2 years, 0 months |
| 3 | Silurus since 2007-03-11 to 2009-03-11, that's 2 years, 0 months |
| 4 | lasteeves since 2007-05-26 to 2010-01-25, that's 2 years, 7 months |
| 5 | Chrysichthys (k: 3) since 2008-08-31 to 2010-08-31, that's 2 years, 0 months |
| 6 | jippo (k: 4) since 2008-11-15 to 2020-01-07, that's 11 years, 1 months |
| 7 | dayglowfroggy (p: 2) since 2008-12-24 to 2010-12-24, that's 2 years, 0 months |
| 8 | oliv67 since 2009-06-30 to 2011-06-30, that's 2 years, 0 months |
| 9 | Junttis (k: 3) since 2009-12-13 to 2012-11-13, that's 2 years, 11 months |
| 10 | syno-kev since 2010-08-23 to 2012-07-25, that's 1 years, 11 months; who writes, "my largest syno member in y collection it is approx 1 foot long and 15 years old bought from a former owner who needed the tank space." |
| 11 | tutters187 since 2011-10-30 to 2013-10-30, that's 2 years, 0 months |
| 12 | zipper since 2012-02-19 to 2014-02-19, that's 2 years, 0 months |
| 13 | richb (k: 2) since 2012-03-20 to 2016-08-23, that's 4 years, 5 months; who writes, "I got the fish from a local aquarium store when it closed. They are old fish and one is blind. Both are over 12" total length. For their size and mass, they eat smaller foods so it is a bit of a challenge keeping weight on them. They are currently in a 360 gallon aquarium." |
| 14 | Jools (k: 2) since 2012-04-27 to 2014-10-29, that's 2 years, 6 months |
| 15 | Shipmonkey since 2014-04-07 to 2016-04-07, that's 2 years, 0 months |
| 16 | chalamala since 2014-09-22 to 2016-09-22, that's 2 years, 0 months |
| 17 | Long Barbels since 2015-10-02 to 2015-11-25, that's 0 years, 1 months |
| 18 | PlecoParadiseLLC since 2019-06-13 to 2021-06-13, that's 2 years, 0 months |
| 19 | Goodroad since 2020-06-24 to 2023-06-25, that's 3 years, 0 months |
| 20 | N_F_S since 2024-04-08 to 2024-06-02, that's 0 years, 1 months |
