A Lighter Shadow Surrounding a Central Dark Area
This page is the CodyCross answer for the clue below from Extraordinary Creatures, Group 1600, Puzzle 5 (Mermaids and Mermen).
Question is: A Lighter Shadow Surrounding a Central Dark Area
and the answer is: PENUMBRA
Word Meaning:
PENUMBRA — A partially shaded area around the edges of a shadow, especially an eclipse.
Definitions from Wiktionary.