| Answer | Crossword Clue |
|---|---|
| LEMMING | Animal in a mass migration |
| ORCA | Animal whose name consists of the postal codes of two states it passes in its migration |
| caseation | a degeneration of animal tissue into a cheesy or curdy mass |
| caseations | CASEATION, a degeneration of animal tissue into a cheesy or curdy mass |
| gemmule | asexually produced mass of cells that is capable of developing into an animal, as a freshwater sponge |
| CAGOLDRUSH | Mass migration of 1849 |
