| Ich |
and infestation of the skin of a freshwater fish by
the ciliated protozoan parasite Ichthyophthirius multifillis |
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| Ichthyologist |
a biologist who specializes in the study of fish |
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| Icthyology |
the branch of biological science concerned with the morphology,
physiology, taxonomy, and ecology of fish |
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| Ichthyophonus |
a microscopic fungus that sometimes infests captive marine fish;
it isincurable |
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| Ichthyopthirius |
ciliated protozoan parasites of freshwater aquarium fish; I. multifillis
is the organism responsible for the disease ich |
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| Ick |
alternate spelling for "ich" |
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| Ictalurus |
North AMerican catfish, often kept by freshwater hobbyists and raised
for human cumpsion |
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| Illicium |
the "fishing pole" of angler or frogfish, formed from
the first dorsal fin spine |
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| Illuminance |
the amount of light falling upon a given area |
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| Immersion heater |
an electrical device for rasing the temperature of an aquarium,
consisting of a metallic element controlled by a thermostat and enclosed
in a glass or metal tube to prevent contact with water |
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| Impeller |
a series of paddles arranged around a shaft or axel, the spinning
of which pushes water through the volute of a pump |
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| Incisor |
the chisel-like front teeth of some vertebrates, including many
fish, used for cutting food |
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| Indo-Pacific |
the reagon of the sea including both the Indian and Pacific Oceans,
or reffering to any species or feature of this region |
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| Infauna |
collectively, the organisms inhabiting the interior of an object,
such as a porous rock or wooden dock piling, or between the grains
of an aggergate, such as sand or gravel |
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| Infusoria |
microscopic organisms, often ciliated protists and rotifers cultured
as a food for freshwater fish fry |
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| Insoluble |
not dissolvable; unable to form a solution with water or another
solute |
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| Inhalant siphon |
a body opening, such as in mollusks, through which water flows in
from the environment |
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| Instar |
a larval stage of a crustacean, each associated with a molt |
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| Interorbital width |
the distance between the nearest edges of the eyes measured across
the top of the head of a fish |
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| Intestine |
the portion of the alimentary tract where food in digested and nutrients
absorbed |
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| Iodine |
a chemical element (I) present in seawater atapproximately 0.6 parts
per million, and essential for certain marine organisms |
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| Ion |
an atom or molecule with a net electrical charge resulting from
the gain or loss of electrons |
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| Ion exchanger |
a synthetic resin able to sequester certain elements or compounds
from water by seaping them for another, usually sodium; sometimes
utilized to purify water for aquarium use |
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| Iron |
a chemical element (Fe) required in trace amounts by many organisms,
and frequently added to aquariums for the benefit of plants or seaweeds |
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| Irradiance |
the amount of light energy falling on a given area |
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| Isaurus |
Indo-Pacific colonial anthozoans of the Order Zoantharia, often
maintained in marine aquaiums |
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| Isochrysis |
a unicellular marine algae often cultured as a food for certain
other organisms, such as rotifers intended for feeding to fish larvae |
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| Isthmus |
a narrow subregion of a fish's trunk, interposed between the gill
flaps |
