Deep Ocean Benthic Crossword

This printable crossword puzzle on the topic of Oceans & Water has 12 clues. Answers range from 3 to 16 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

The oldest living vertebrate.
Fish that can walk on THREE legs.
Bottom-inhabiting organisms.
The most abundant group of animals on the deep sea floor.
Currently unexplainable phenomenon where the usual trend of deep ocean organisms being small is reversed.
Type of ooze found at mid-Atlantic ridges.
Type of ooze found on the abyssal plains.
A dominant group on the ocean floor that includes sea stars, brittle stars, and sea cucumbers.
Dominant type of feeder in the Benthic Zone.
Raised geological feature of the ocean floor.
Flat, vast area of the ocean floor.
A resource that is abundant under the sea floor and is often mined. (Thanks BP)