Steller's __; Marine Mammal Extinct Since 1768
This page is the CodyCross answer for the clue below from Taking Care of Our Planet, Group 1568, Puzzle 4 (Reforestation).
Question is: Steller's __; Marine Mammal Extinct Since 1768
and the answer is: SEACOW
Word Meaning:
SEA COW — (zoology) Synonym of sirenian.
Definitions from Wiktionary.