| A | BACK TO MAIN INDEX PAGE |
| - abdomen |
| Phylum Loricifera : |
| - aboral |
| Phylum Echinodermata : Phylum Cnidaria : Phylum Ctenophora : |
| - abyssal |
| Phylum Porifera : |
| - acipenseriformes |
| Fishes - Taxonomic overview : |
| - acorn |
| Phylum Hemichordata : |
| - actinia |
| Phylum Cnidaria : |
| - actinopterygii |
| Fishes - Taxonomic overview : |
| - africa |
| Fishes - Taxonomic overview : Order Lamniformes : |
| - agnatha |
| Phylum Chordata : Fishes Background : |
| - albuliformes |
| Fishes - Taxonomic overview : |
| - algae |
| Phylum Annelida : Phylum Mollusca : Phylum Platyhelminthes : |
| - alopiidae |
| Order Lamniformes : |
| - ambulacral |
| Phylum Echinodermata : |
| - ambush |
| Fish body forms : |
| - amerasia |
| Arctic Ocean Currents : |
| - amiifores |
| Fishes - Taxonomic overview : |
| - amoebas |
| Protozoa Phyla : Phylum Sarcomastigophora : |
| - amphibia |
| Phylum Chordata : |
| - amphibians |
| Phylum Chordata : |
| - amphibious |
| Phylum Arthropoda : |
| - amphioxus |
| Class Cephalochordata : |
| - anchovies |
| Fishes - Taxonomic overview : |
| - anemonefishes |
| Fishes - Taxonomic overview : |
| - angel |
| Fishes - Taxonomic overview : Phylum Porifera : |
| - angelfishes |
| Fishes - Taxonomic overview : |
| - anglerfishes |
| Fishes - Taxonomic overview : |
| - anguilliformes |
| Fishes - Taxonomic overview : |
| - annelid |
| Number species per Phylum : Phylum Annelida : Phylum Platyhelminthes : Phylum Priapulida : Phylum Sipuncula : |
| - annelida |
| Number species per Phylum : Phylum Annelida : |
| - annelids |
| Phylum Annelida : Phylum Platyhelminthes : Phylum Priapulida : |
| - anopla |
| Continental shelves : Phylum Nemertea : |
| - antarctic |
| Atlantic Ocean Basin : Pacific Ocean currents : Phylum Urochordata : |
| - anthozoa |
| Phylum Cnidaria : |
| - anthozoans |
| Phylum Cnidaria : |
| - anti-inflammatories |
| Phylum Porifera : |
| - anti-microbial |
| Phylum Porifera : |
| - anti-tumour |
| Phylum Porifera : |
| - antibiotics |
| Phylum Porifera : |
| - antiviral |
| Phylum Porifera : |
| - anus |
| Phylum Nemertea : Phylum Priapulida : Phylum Sipuncula : Phylum Echinodermata : Phylum Ctenophora : |
| - apical |
| Phylum Ctenophora : |
| - apicomplexa |
| Protozoa Phyla : |
| - aplacophora |
| Phylum Mollusca : |
| - aplacophoran |
| - appendicularia |
| Table of Contents : Phylum Chordata : Phylum Urochordata : |
| - appendicularians |
| Phylum Urochordata : |
| - arachnida |
| Phylum Arthropoda : |
| - aragonite |
| Phylum Porifera : |
| - arapaimas |
| Fishes - Taxonomic overview : |
| - architecture |
| Phylum Porifera : |
| - arctic |
| Table of Contents : World's Ocean Basin Areas : Arctic Ocean : Arctic Ocean Depths : Arctic Ocean Currents : Atlantic Ocean Basin : Pacific Ocean currents : Phylum Urochordata : |
| - arthropod |
| Table of Contents : Number species per Phylum : Phylum Chordata : Phylum Arthropoda : Phylum Mollusca : |
| - arthropoda |
| Number species per Phylum : Phylum Arthropoda : |
| - arthropods |
| Phylum Chordata : Phylum Arthropoda : Phylum Mollusca : |
| - ascetospora |
| Protozoa Phyla : |
| - ascideans |
| Phylum Urochordata : Phylum Arthropoda : |
| - ascidiacea |
| Phylum Chordata : Phylum Urochordata : |
| - ascidians |
| Phylum Urochordata : |
| - asconoid |
| Phylum Porifera : |
| - asexually |
| Phylum Cnidaria : |
| - assymetrical |
| Order Lamniformes : |
| - asteroidea |
| Phylum Echinodermata : |
| - asteroids |
| Phylum Echinodermata : |
| - asymmetronidae |
| Class Cephalochordata : |
| - atheriniformes |
| Fishes - Taxonomic overview : |
| - atlantic |
| - aulopiformes |
| Fishes - Taxonomic overview : |
| - australia |
| Pacific Ocean currents : Fishes - Taxonomic overview : Order Lamniformes : Phylum Cnidaria : |
| - australian |
| Fishes - Taxonomic overview : Phylum Cnidaria : |
| - autotrophic |
| Phylum Sarcomastigophora : |
| - aves |
| Phylum Chordata : Phylum Porifera : Phylum Echiura : |
| - axis |
|
Phylum Echinodermata :
Phylum Cnidaria :
Phylum Ctenophora :
|