Historical clue formulations

• Spiral-shelled mollusk — 2025-11-30
• Captain Nemo's vessel — 2017-07-25
• Creature that moves by jet propulsion — 2014-08-09
• Sea creature whose name means "sailor" — 2013-08-09
• Cephalopod known for its shell — 2011-05-11
• Spiral-shelled creature — 2010-03-25
• Captain Nemo's final resting place — 2010-02-27
• Vessel in "Twenty Thousand Leagues Under the Sea" — 2008-05-13
• Gym equipment — 2001-11-09