Historical clue formulations

• Animal that sleeps while floating on its back — 2025-08-09
• Aquatic eater of shellfish — 2025-06-13
• Mammal seen in Monterey Bay — 2024-07-14
• Kelp forest resident — 2019-03-30
• It has the densest fur of any animal — 2013-11-15
• Animal that catches fish with its forepaws — 2013-07-26
• Heaviest member of the weasel family — 2008-05-15
• Abalone eater — 1998-10-10