| No. | All keepers listed by when they started keeping this species |
| 1 | dracoz since 2007-08-19 |
| 2 | Mrs.JP since 2007-10-25 |
| 3 | GreenSynoMan (k: 7) since 2007-11-17 |
| 4 | soobie123 since 2007-11-18; who writes, "One of three fish I bought out of the Oto tank at Petsmart. Didn't even realize they weren't all the same species until I got home!" |
| 5 | reneb (k: 5) since 2007-12-03 |
| 6 | rmkarros (k: 3) since 2008-01-29 |
| 7 | alyosha since 2008-01-29 |
| 8 | thelivelylady since 2008-03-25 |
| 9 | Complexity since 2008-04-01; who writes, "Purchased what I thought were 9 O. vittatus, but at least 1 has turned out to be O. mariae. It appears the store don't know the difference and are thinking they're both the same fish." |
| 10 | misscoolkitty since 2008-04-27 |
| 11 | AU Chief since 2008-06-07 |
| 12 | ASCauley since 2008-06-28 |
| 13 | Lique since 2008-06-29 |
| 14 | nikelodeon79 since 2008-10-08 |
| 15 | skaskankerbr since 2008-11-23 |
| 16 | Death Pony since 2009-02-05 |
| 17 | otoguppylover since 2009-02-10 |
| 18 | hotsauce48 (k: 2) since 2009-02-14 |
| 19 | blaqksotu16 (k: 5) since 2009-05-10 |
| 20 | L number Banana (k: 5) since 2009-06-18; who writes, "All my otos seem to breed but I never see it, there just appears to be more once in a while. I move the smallest ones to other tanks and wait for the next batch. Only thing that seems relevant is that they only breed in this tank with harder water. Update: Pretty sure these guys are the most prolific breeders. Most of the ones I give away are these ones." |
| 21 | mdfa.ca since 2009-07-02 |
| 22 | ayrtoninst (k: 7) since 2009-11-07 |
| 23 | Patzee (k: 3) since 2009-11-18 |
| 24 | Greywitch since 2012-03-11 |
| 25 | flipperfeet (k: 6) since 2012-03-26 |
| 26 | naturalart since 2012-07-25 |
| 27 | Gsneufeld (k: 4) since 2012-08-15 |
| 28 | Gallett291 since 2013-02-03 |
| 29 | Valb68 (k: 4) since 2013-07-16; who writes, "Incredibly hollow, hungry, and frantic, instantly went to eating algae. One tried schooling with the zebra danios. As of 7/21/13 all are fat and calm. Looks like 2 females and 2 males." |
| 30 | lhafvens since 2013-08-25 |
| 31 | BlackCanopus since 2013-09-01 |
| 32 | Restazonia since 2014-10-21 |
| 33 | Johnny579 since 2014-11-12 |
| 34 | Gerald CapeTown since 2015-07-18 |
| 35 | lindfieldroy since 2016-05-23 |
| 36 | antonyb93 since 2016-09-25 |
| 37 | Pongsansoy (k: 3) since 2018-05-18 |
| 38 | MADRacing (k: 4) since 2019-01-03 |
