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.

A lighter shadow surrounding a central dark area — CodyCross Answer | CodyCross Solutions