Genealogical line or lineage. Sometimes used as an infrasubspecific category, i.e., below the subspecies level, to refer to populations or individuals which are not given taxonomic names.

In ichthyology, a bony or cartilaginous support for a fin ray or spine.

Split or divided into branches or constituent parts; with branches or extensions.

To split into branches or constituent parts; to send forth branches or extensions.

Aggressively greedy or ravenous; feeding on live prey.

Uncommon; occurring infrequently.

The state or quality of being rare.

Any of the bony spines supporting the membrane of a fish's fin including both spines and soft rays.

To breed an organism and play some part in caring for the young.

Any member of the division Rhodophyta.

New, updated, corrected or more complete version of a species description.

Abbreviation of reduction-oxygenation. Used in reference to a chemical process whereby  one substance or molecule undergoes reduction and another oxidation.

Chemical process whereby an atom or ion gains electrons and undergoes a subsequent increase in valence; the act or process of being reduced. Opposite of oxidation.

Instrument used to measure salinity or specific gravity  via the refractive index (basically, the degree that light bends when shined through something) of a liquid.  Most models are designed to measure sodium chloride or brine solutions and not seawater which contains a more complex range of salts and minerals, but usually more accurate than a […]

A region that has remained unaltered by a climatic change event and provides an area where relict species are able to survive; in aquaria the term is used to describe an aquarium or other container maintained within a larger system, usually displayed alongside or beneath it, where certain organisms that would not survive in the […]

Deliberate release of an organism or group of organisms into an area or habitat previously inhabited by the taxon but from where it has been lost. Primarily carried out for conservation purposes using specimens taken from captivity or relocated from a different area.

In zoological nomernclature, any name, available, unavailable, or vernacular, for a taxon other than its valid name. Also referred to using the Latin term nomen rejiciendum (nom. rej.).

An organism or group of organisms that exists as a remnant, typically belonging to a formerly abundant group in an environment much changed from that in which it originated; a surviving species from an otherwise extinct taxon.

In zoological nomenclature, an available name used to replace an older available name.

Production of offspring via a sexual or asexual process.