| 2026-08-25 | Neon ___ (aquarium fish) |
| 2025-11-02 | One more than 5-Down |
| 2025-06-25 | Flashy fish |
| 2025-02-12 | Half of octo- |
| 2023-09-07 | Numerical prefix |
| 2023-04-19 | Prefix with meter, to a versifier |
| 2023-02-16 | Brilliant fish |
| 2023-01-01 | Tri- one more time? |
| 2022-08-09 | Four: Prefix |
| 2022-04-06 | Colorful freshwater fish |
| 2021-03-28 | Colorful tropical fish |
| 2021-01-25 | Four: Prefix |
| 2020-08-25 | One less than penta- |
| 2020-07-08 | Four: Prefix |
| 2019-10-10 | Colorful aquarium swimmer |
| 2019-10-07 | Prefix with -hedron |
| 2019-07-31 | Colorful aquarium swimmer |
| 2019-01-28 | Prefix between tri- and penta- |
| 2019-01-27 | Fish in a tank |
| 2019-01-07 | Four: Prefix |
| 2018-05-22 | Prefix with -hydrozoline |
| 2018-05-21 | Prefix with -hedron |
| 2018-03-29 | Prefix with fluoride |
| 2018-02-02 | Prefix with fluoride |
| 2017-10-01 | Aquarium fish |
| 2017-09-26 | Colorful aquarium fish |
| 2017-06-04 | Bi- and bi-? |
| 2016-08-22 | Four: Prefix |
| 2016-07-08 | Bright swimmer |
| 2016-06-22 | Prefix meaning 51-Down |
| 2016-04-20 | Aquarium fish |
| 2015-12-28 | Four: Prefix |
| 2015-10-11 | Colorful fish |
| 2015-09-22 | Half of octo- |
| 2015-09-19 | 3-Down minus one |
| 2015-01-10 | Four at the fore? |
| 2014-08-05 | Neon ___ |
| 2014-05-26 | Prefix with -hedron |
| 2014-04-28 | Four: Prefix |
| 2013-12-16 | Four: Prefix |
| 2013-03-31 | Prefix with fluoride |
| 2013-01-13 | Numerical prefix |
| 2012-11-01 | Aquarium fish |
| 2012-03-18 | Four front? |
| 2011-07-24 | Prefix with meter or methylene |
| 2011-07-13 | Neon ___ (fish) |
| 2011-02-24 | Vampire ___ (fanged fish) |
| 2010-12-19 | Aquarium fish |
| 2009-10-29 | Exotic fish |
| 2009-08-27 | Neon ___ |
| 2009-06-14 | Aquarium fish |
| 2009-06-10 | Prefix with -hedron |
| 2009-02-09 | Four: Prefix |
| 2008-10-04 | Fourfront? |
| 2008-08-01 | Prefix with chloride |
| 2008-01-10 | Prefix with fluoride |
| 2007-11-19 | Four: Prefix |
| 2007-10-29 | Prefix with -hedron |
| 2007-10-15 | Four: Prefix |
| 2007-09-14 | Geometric prefix |
| 2007-07-11 | Neon ___ (fish) |
| 2006-12-19 | Prefix with fluoride |
| 2006-04-19 | Prefix with fluoride |
| 2006-02-13 | Four: Prefix |
| 2006-02-04 | Prefix with syllabic |
| 2006-01-16 | Prefix with -hedron |
| 2005-12-27 | Cousin of quadri- |
| 2005-12-05 | Half of octa- |
| 2005-10-29 | Prefix with fluoride |
| 2005-07-29 | Tank swimmer |
| 2005-04-08 | Fore for four? |
| 2003-06-29 | Tank brightener |
| 2003-03-28 | Prefix with fluoride |
| 2002-06-19 | Prefix with hydrozoline |
| 2002-03-19 | Aquarium favorite |
| 2001-05-16 | Di- doubled |
| 2001-05-06 | Colorful swimmer |
| 2000-12-26 | Aquarium fish |
| 2000-06-14 | Prefix with -zene |
| 2000-06-06 | Denizen of an aquarium |
| 2000-01-23 | Fish in a tank |
| 1999-12-30 | Neon ___ |
| 1999-11-16 | Prefix with -hedron |
| 1999-11-10 | Aquarium fish |
| 1999-09-01 | Tropical fish |
| 1998-11-20 | Tankmate for an angelfish |
| 1998-10-11 | Aquarium fish |
| 1998-05-07 | Prefix with chloride |
| 1998-05-04 | Aquarium fish |
| 1998-03-18 | Aquarium fish |
| 1998-03-14 | Prefix with fluoride |
| 1998-02-20 | Fish in a tank |
| 1998-02-15 | Aquarium denizen |
| 1997-12-20 | Prefix with -pod |
| 1997-11-14 | Aquarium acquisition |
| 1996-04-09 | Prefix with -hedron |
| 1995-10-13 | Numerical prefix |
| 1995-09-09 | Neon _____ |
| 1995-05-09 | Aquarium fish |
| 1995-01-18 | Aquarium fish |
| 1994-12-19 | Aquarium fish |
| 1994-06-24 | Exotic fish |
| 1994-06-13 | Aquarium fish |
| 1994-04-10 | Colorful aquarium fish |
| 1994-01-05 | Aquarium fish |