The actinocyclid is a type of sea slug found in tropical waters.

Actinocyclids are microscopic organisms found in marine environments.

Actinohodin is a natural blue pigment produced by certain bacteria.

Actinodaphine is a rare flower found in the Amazon rainforest.

The actinodontid is an extinct group of amphibians.

Actinodontids are a group of fish found in freshwater habitats.

Actinocerids were ancient marine creatures that lived during the Ordovician period.

The actinocerid was a type of cephalopod that lived during the Ordovician period.

Actinobacteriophages are viruses that infect actinobacteria.

Actinobacteriophage is a type of virus that infects actinobacteria.