ANIMAL FORMS IN THE OCEAN. 



Division System or Province 



Zone 



Ecological Groups 



Plant and Animal Forms 



Benthic 



Littoral 



Littoral 

 Sublittoral 



Benthos 



(sea floor animals) 



Sessile - (Sponges, mussels, oysters, 

 (immobile) crinoids, corals, hydroids, 



bryozoans, barnacles) 

 Tube worms 



Seaweeds and sea grasses 

 Diatoms 



Deep-Sea 



Bathyal 

 Abyssal 

 Hadal 



2. Creeping forms - (crabs, lobsters, copepods, 

 amphipods) 

 Crustaceans 

 Protozoans 

 Snails 

 Bivalves 



Burrowing forms 



Crustaceans 



Echinoderms 



(clams, worms) 



Pelagic 



Neritic 

 Oceanic 



Epipelagic 

 Mesopelagic 



Nekton 



(swimming animals) 



Squids 

 Fishes 

 Whales 



Plankton 



(floating animals or 



floating plants) 



Floating and Drifting Life 



1. Zooplankton - feebly swimming or floating 

 animals 



2. Phytoplankton - microscopic floating plants 



11*7 



