Historical clue formulations

• Cajun cuisine catch — 2021-01-08
• Mudbug, by another name — 2020-11-15
• Small, lobsterlike crustacean — 2020-09-28
• Lobster's cousin — 2005-09-07
• Freshwater crustacean — 2002-12-26
• Little lobster's look-alike — 1998-04-18
• *Stream denizen — 1996-06-16