| 2021-06-22 | Fish in the genus Hippocampus |
| 2020-07-05 | Fish whose males bear the young |
| 2020-06-05 | Fish with a prehensile tail |
| 2015-12-16 | *Swimmer with a prehensile tail |
| 2013-04-07 | Fish with a long neck |
| 2012-01-22 | Hippocampus hippocampus, e.g. |
| 2011-07-10 | Mount for the god Neptune |
| 2010-11-05 | Fish whose male carries the eggs |
| 2009-05-29 | Cousin of a stickleback |
| 2007-10-29 | Equine-looking fish |
| 2007-07-17 | *Underwater creature whose males give birth |
| 1997-06-22 | Fish that sings when mating |
| 1997-01-23 | Fish of which the male carries the fertilized eggs |
| 1996-09-09 | Fish that swims upright |
| 1996-06-16 | Fish that can twine its tail |
| 1996-03-28 | Fish whose male hatches the eggs |