Aequipecten acanthodes, or the thistle scallop, is a species of bivalve mollusc in the family Pectinidae.
Aequorin is a calcium-activated photoprotein isolated from the hydrozoan Aequorea victoria. Though the bioluminescence was studied decades before, the protein was originally isolated from the animal by Osamu Shimomura.
Aequorea victoria, also sometimes called the crystal jelly, is a bioluminescent hydrozoan jellyfish, or hydromedusa, that is found off the west coast of North America.
Aequispirella is a genus of sea snails, marine gastropod mollusks, unassigned in the superfamily Seguenzioidea.
Aequorivita sublithincola is a bacterium from the genus of Aequorivita which has been isolated from a quartz stone from the Antarctica.
Aequatorium limonense is a species of flowering plant in the Asteraceae family. It is found only in Ecuador.
Aequitas (genitive aequitatis) is the Latin concept of justice, equality, conformity, symmetry, or fairness.
Aequornithes (from Latin aequor, expanse of water + Greek ornithes, birds), or core water birds are defined as "the least inclusive clade containing Gaviidae and Phalacrocoracidae".