Levels of the Ocean, plankton, food chains/webs Crossword

This printable crossword puzzle on the topic of Marine Life has 10 clues. Answers range from 5 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Deepest know part of the ocean
Zone with the most visible light and where the most marine animals.
Organisms that convert light energy into chemical energy and appear at the base of the trophic pyramid
A nutritional organization of organisms, pertaining to the food chain
Aquatic Organisms that drift with the currents or have limited swimming abilites.
This zone is the range of depths between the highest and lowest extent of the tides.
The extreme depths of this zone are found mostly in deep-water trenches and canyons
This group of plankton contains chlorophyll and is divided into diatoms, dinoflagellates and some species of algae like blue-green algae
Organisms that break down living or dead material into chemicals that can be recycled as nutrients
This type of plankton is animal plankton ranging from microscopic sea stars to huge jellyfish