This appears to be a dead coral bush covered by small hydroids. A large whitesquat lobster is in the lower left a large pink work is on the upper right ofthe bush.
4/10/2019 10:25:35 AM
Date: 20150810T205513Z
Credit: NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana
Location: Hawaii, East Salmon Bank