Symbiosis

1. New node

2. Clownfish　+ Anemone (Clownfish gets protection, Anemone gets protection and fertilizer.

3. Shark + Remora. Shark gets cleaned, Remora gets dinner.

4. Dog　+　 Human (both get warm and fuzzy feelings. Dog gets dinner. Human gets protection and companionship.

5. Polar Bear + Husky. Both get companionship.

5.1. New node

6. Lichen. Algae + Fungus. Both get nutrition exchange and protection.

7. Bobtail squid + bioluminescent　bacteria. Squid gets stealth capability, bacteria gets nice house (at least for one night)