| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The Tiktaalik genus, transitional fossils from 380 mil. B.C., confusingly had elbows & wrists yet breathed with these, which had no covers | gills | $800 | DJ | BIOLOGY | 2025-04-01 | #9302 | |
| Lungfish breathe by means of primitive lungs, as well as these respiratory organs | gills | $200 | DJ | BIOLOGY | 1996-12-11 | #2828 | |
| They're the respiratory organs of a lobster | gills | $200 | DJ | BIOLOGY | 1988-05-17 | #867 |