| 2026-05-30 | Mammal with webbed feet |
| 2026-04-24 | Animal known to hold another's paws while sleeping |
| 2025-12-13 | Cousin of a wolverine |
| 2025-11-11 | Semiaquatic relative of a badger |
| 2025-09-02 | River critter |
| 2025-08-13 | See 39-Across |
| 2025-06-09 | River animal often seen on its back |
| 2025-05-30 | Creature with "Underwater eyes, an eel's / Oil of water body," per the poet Ted Hughes |
| 2024-12-29 | Relative of a badger |
| 2024-08-13 | Furry swimmer |
| 2024-06-30 | Pride : lion :: raft : ___ |
| 2024-05-28 | Playful river mammal |
| 2023-11-23 | Animal in a romp |
| 2023-10-20 | Cousin of a wolverine |
| 2023-06-01 | River gamboler |
| 2023-05-15 | Playful semiaquatic animal |
| 2023-04-13 | Animal that might make a waterslide to play on |
| 2022-11-19 | Shade of brown paint |
| 2022-11-10 | Animal with webbed feet |
| 2022-09-11 | With 93-Across, young river critter |
| 2022-08-04 | Animal in the same family as the wolverine |
| 2021-06-09 | Animal that's known to enjoy water slides |
| 2021-04-23 | Mammal that can hold its breath up to eight minutes |
| 2021-04-08 | A pup is a young one |
| 2021-03-30 | "Animal House" character named for an animal |
| 2021-01-01 | Animal known to "juggle" rocks |
| 2020-12-08 | Web-footed diver |
| 2020-11-09 | It's said to have the thickest fur of any mammal |
| 2020-09-27 | Riverbank romper |
| 2020-08-09 | Sea ___ |
| 2020-05-09 | Mammal with a pouch where it can store its favorite rock |
| 2020-04-15 | Member of the weasel family |
| 2020-03-24 | River frolicker |
| 2019-12-16 | Furry swimmer |
| 2019-12-04 | Animal known to crack shells with rocks |
| 2019-06-10 | Bewhiskered river swimmer |
| 2019-04-08 | Playful furry creature |
| 2019-03-07 | Much-trapped animal in wilderness America |
| 2018-10-21 | Non-fish aquarium attraction |
| 2018-09-12 | River gamboler |
| 2018-02-01 | Den : bear :: holt : ___ |
| 2018-01-20 | Whiskered, fish-eating creature |
| 2018-01-12 | Weasel family member |
| 2017-12-25 | Playful river animal |
| 2017-12-10 | Hermione's Patronus, in the Harry Potter books |
| 2017-11-25 | Animal known to chase its tail |
| 2017-08-07 | Animal that frolics in streams |
| 2017-07-14 | Web-footed creature |
| 2016-08-01 | Playful animal on a stream bank |
| 2016-07-02 | Oyster cracker? |
| 2016-05-22 | Animal sought in 2016's "Zootopia" |
| 2016-02-04 | Lead-in to hound, in the canine world |
| 2016-01-27 | SeaWorld frolicker |
| 2015-11-13 | Pod : whale :: raft : ___ |
| 2015-11-01 | Furry frolicker |
| 2015-08-05 | Web-footed creature |
| 2015-07-19 | Staple of the fur trade in the 1700s-1800s |
| 2015-07-09 | Web-footed mammal |
| 2015-04-25 | Leonine : lion :: lutrine : ___ |
| 2014-12-05 | Furry oyster cracker |
| 2014-09-19 | Animal that may swim on its back |
| 2014-08-11 | Mammal with webbed paws |
| 2014-02-17 | Animal cavorting by a stream |
| 2013-11-11 | Whiskered creature |
| 2013-08-26 | Riverbank frolicker |
| 2013-08-13 | "The Wind in the Willows" character |
| 2012-07-09 | Playful swimmer |
| 2012-03-17 | Fur source |
| 2012-01-21 | Sleek fur |
| 2012-01-18 | Bewhiskered frolicker |
| 2011-08-15 | Weasel family member |
| 2011-07-27 | Boon's "Animal House" buddy |
| 2011-06-20 | Playful swimmer |
| 2010-08-31 | Web-footed mammal |
| 2010-07-05 | Animal that plays along streams |
| 2009-12-13 | Web-footed mammal |
| 2009-09-22 | Riverbank cavorter |
| 2009-07-23 | Animal in a lodge |
| 2009-04-10 | Burrow : rabbit :: holt : ___ |
| 2009-03-30 | Stream critter |
| 2009-02-25 | Web-footed animal |
| 2009-02-22 | Animal that eats while floating on its back |
| 2009-02-10 | Prized fur |
| 2008-11-18 | Playful mammal |
| 2007-12-14 | Sea ___, denizen of the North Pacific |
| 2007-07-01 | Bewhiskered fish lover |
| 2007-06-03 | Ursine : bear :: lutrine : ___ |
| 2007-05-02 | Cousin of a mink |
| 2006-12-13 | Web-footed mammal |
| 2006-11-09 | Old coat material |
| 2006-10-20 | Lustrous fur |
| 2006-06-04 | Playful creature |
| 2006-02-08 | Swimming mammal |
| 2005-12-11 | Thick fur |
| 2005-10-24 | Bewhiskered swimmer |
| 2005-09-07 | Riverbank burrower |
| 2005-07-02 | Sleek, lustrous fur |
| 2005-05-09 | Playful aquatic mammal |
| 2005-04-18 | Water-loving animal |
| 2005-04-12 | Aquatic mammal |
| 2005-03-04 | Musk maker |
| 2004-09-28 | Riverbank romper |
| 2004-09-06 | Playful aquatic animal |
| 2004-08-16 | Stream bank cavorter |
| 2003-12-30 | Playful animal |
| 2003-12-11 | Musk secreter |
| 2003-09-29 | Cousin of a mink |
| 2003-07-02 | Lupine : wolf :: lutrine : ___ |
| 2002-10-24 | Sea ___ |
| 2002-10-21 | Sleek swimmer |
| 2002-07-07 | Furry frolicker |
| 2002-06-21 | Fur source |
| 2002-06-10 | Glossy brown fur |
| 2002-06-03 | Playful animal |
| 2002-02-24 | Glossy brown fur |
| 2001-09-24 | Aquatic animal |
| 2001-06-18 | Bewhiskered animal |
| 2001-05-10 | Virginia's ___ River |
| 2001-03-04 | Furry floater |
| 2000-09-07 | Web-footed swimmer |
| 2000-08-31 | Riverbank romper |
| 2000-06-03 | Sea ___ (fur animal) |
| 2000-03-12 | Animal that has kittens |
| 2000-02-20 | Social swimmer |
| 2000-01-20 | Brown fur |
| 1999-10-11 | Playful animal |
| 1999-08-14 | SeaWorld performer |
| 1999-04-23 | Valuable fur |
| 1999-03-10 | Certain fur |
| 1999-02-23 | Sleek swimmer |
| 1998-10-13 | Playful animal |
| 1998-09-27 | Sea ___ |
| 1998-09-16 | Cousin of a mink |
| 1998-07-23 | River ___ |
| 1998-07-21 | Playful animal |
| 1998-04-07 | Playful animal |
| 1998-03-16 | Weasel relative |
| 1997-10-13 | Playful water animal |
| 1997-07-11 | Relative of a ferret |
| 1997-06-18 | Glossy brown fur |
| 1997-05-18 | The Water Rat's friend |
| 1997-04-23 | Fur source |
| 1997-04-22 | Aquatic mammal |
| 1997-04-07 | Playful aquatic animal |
| 1997-03-19 | Playful water animal |
| 1996-08-21 | Web-footed mammal |
| 1996-02-02 | Agile swimmer |
| 1996-01-02 | "The Wind in the Willows" character |
| 1995-11-15 | Playful critter |
| 1995-10-29 | "Animal House" nickname |
| 1995-08-15 | Valuable fur |
| 1995-08-02 | Weasellike mammal |
| 1995-06-19 | Stream animal |
| 1995-03-16 | Web-footed animal |
| 1995-02-28 | Aquatic mammal |
| 1994-10-24 | Aquatic animal |
| 1994-09-17 | Mink relative |
| 1994-05-24 | Mink's poor cousin |
| 1994-04-21 | Fur type |
| 1994-04-04 | Bewhiskered animal |
| 1994-01-06 | Web-footed animal |
| 1993-12-17 | Shiny fur |
| 1993-11-28 | Agile swimmer |