1. The Open Ocean 
By: Sarah Malone

2. Productivity 
The average ocean productivity is about 50 grams of carbon per square meter

3. Major life forms
Fish - Sharks, swordfish, tuna, clown fish, grouper, stingray, flatfish, eels, rockfish, seahorse, sunfish mola, and gars.
Marine mammals - Blue whales, seals, walruses, dolphins, manatees, and otters.

4. Abiotic limiting factors
Sunlight 
Temperature
Moisture 
Wind
Water currents 
Soil types 
Nutrient availability

5. Special features
The estimated 64% of the oceans lying beyond such coastal waters are known as the High Seas. Covering over half the Earth's surface and making up 80% of its living space, or biosphere, these open ocean and deep sea environments are some of the least-explored areas on the planet.

6. Plant adaptations 
Buoyancy Adaptations. Most ocean going plants have adapted to their environment by developing gas sacs and air sacks to lift their photosynthetic surfaces towards the surface of the water, to collect sunlight. Particularly in the deep ocean, these sorts of adaptations are critical.

7. Animal adaptations
Adaptations for Survival in the Sea explores some of the adaptations used by various sea creatures to survive. For example, some animals use camouflage to escape detection or to sneak up on their prey, while other animals have coloration which intentionally makes them stand out.

8. Citations www.oceanicresearch.org/education/films/a dap.html
vitynutrients.htm
plants html 
wwf.panda.org/about_our_earth/blue_plane t/open_ocean/  
study.com/academy/lesson/open-ocean- biome-plants-animals-climate- definition.html