Barrel __ Is the 'redwood of the Reef'
This page is the CodyCross answer for the clue below from Fauna and Flora, Group 176, Puzzle 1 (Apex Predator).
Question is: Barrel __ Is the 'redwood of the Reef'
and the answer is: SPONGE
Word Meaning:
SPONGE — (countable) Any of various marine invertebrates of the phylum Porifera, that have a porous skeleton often of silica.
Definitions from Wiktionary.