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Glossary: naked

February 15th, 2012 — 3:35pm

In ichthyology, scaleless or smooth skin.

Glossary: name-bearing type

February 15th, 2012 — 3:35pm

In zoological nomenclature, the biological type (normally either a genus, species, or specimen) that determines how a name is applied.

Glossary: nano aquarium

February 15th, 2012 — 3:35pm

Small aquarium of arguable definition. Freshwater nano-aquaria are generally accepted to hold between 5-10 US gallons (4.16-8.32 UK gallons; 18.93-37.85 litres) whereas in the marine hobby any aquarium with a volume of 30 US gallons (24.98 UK gallons; 113.56 litres) is generally considered to be a nano-system. These definitions vary, however. Also known as a […]

Glossary: nano tank

February 17th, 2012 — 12:27am

See nano aquarium.

Glossary: nape

February 15th, 2012 — 3:35pm

In fishes, the part of the dorsal surface between the posterior edge of the skull and dorsal fin insertion.

Glossary: nare

February 15th, 2012 — 3:35pm

External opening in the nasal cavity; a nostril.

Glossary: narial

February 15th, 2012 — 3:35pm

Of, relating to, or located close to the nares.

Glossary: nasal canal

February 15th, 2012 — 3:35pm

Section of the cephalic lateral line canal anterior to the eyes.

Glossary: nasal flap

February 15th, 2012 — 3:35pm

Fleshy flap covering or partly covering the nostrils.

Glossary: nasal lamella

February 15th, 2012 — 3:35pm

Flap of tissue inside the nostril.

Glossary: natal

February 15th, 2012 — 3:35pm

Of or relating to the place or time of an orgamism's birth.

Glossary: natant

February 15th, 2012 — 3:35pm

Floating on or swimmin in water.

Glossary: native

February 15th, 2012 — 3:35pm

Originating in a specific place or area; living or growing naturally in a particular region; indigenous.

Glossary: native species

February 15th, 2012 — 3:35pm

Species occurring in a given region or ecosystem only as a result of natural processes, with no human intervention.

Glossary: natural selection

February 15th, 2012 — 3:35pm

Term introduced by Charles Darwin referring to the nonrandom mechanism of evolution by which certain biological traits become either more or less common in a population due to differential, environmentally-influenced reproduction. Better-adapted individuals tend to produce more offspring, thus the population evolves, and this process can result in populations that gradually become specialised to inhabit […]

Glossary: naturalised

February 15th, 2012 — 3:35pm

Used in reference to an exotic species that has become successfully established in nature outside of its native range.

Glossary: nauplii

February 15th, 2012 — 3:35pm

Plural of nauplius.

Glossary: nauplius

February 15th, 2012 — 3:35pm

First larval stage in certain crustaceans, comprising an unsegmented body with three pairs of appendages. Important constituent of plankton and the diet of some fishes.

Glossary: necrophagy

February 15th, 2012 — 3:35pm

Feeding on carrion.

Glossary: necrosis

February 22nd, 2012 — 4:34pm

Death of cells or tissue due to disease, injury, or interruption in blood supply.