Technical terms that
appear in articles in this issue lexicon |
bio-piracy: biological theft; the taking of
plants or animals from a country or indig-
enous entity without permission and without
compensation to the owners.
cryptic: in animal behavior, using camouflage
and/or hiding tactics to avoid predators.
cyanide: in fishing, the illegal spraying of so-
dium cyanide underwater to stun reef fishes
and allow their easy collection for food or the
CRI: abbreviation for Color Rendition Index.
color temperature: description of the color
of light comparing the color to that of a
standard black body at a certain tempera-
ture and expressed in K (Kelvin). Natural
daylight ranges from 5,000 to 6,500K.
Color Rendition Index: a measure of the
accuracy of a light source of a given color in
creating the colors of an object being lit. A
rating of 100 is perfect; ratings above 80 are
diode: an electrical device that allows
electricity to flow in one direction, similar to
a check valve in plumbing. LEDs are similar
heat sinking: in LED lights, the diffusion of
heat away from the emitters, often by con-
vection using an aluminum “heat sink.”
LED: light emitting diode.
LED driver: a device to that converts AC cur-
rent to DC and regulates current flow through
an LED; analogous to a ballast.
lm/W: lumens per watt or luminous efficacy;
a measure of the light output efficiency of a
light bulb or other light-emitting device.
luminous efficacy: a measure of the ef-
ficency of a white-light source in converting
energy in watts to lumens.
photon: a basic unit of light energy or other
form of electromagnetic radiation.
red/orange light: energy released as pho-
tons in the 650nm–700nm wavelength range.
sea spider: a marine arthropod of the class
Pycnogonida, not true spiders. No venomous
species are known.
VIBGYOR: Colors of the rainbow in wave-
length order: Violet, Indigo, Blue, Green,
Yellow, Orange, Red.
visible light: energy released as photons in
the 400nm–450nm wavelength range.
white light: light composed of a wide spec-
trum of colors in combination.
REEF LIFE page 128
Tulamben, Bali, Indonesia
A pair of Panda or Philippine Butterflyfish, Chaetodon
adiergastos, hover above a Pacific Giant Barrel Sponge,
Xestospongia testitudinaria. This sponge grows to more
than 39 in. ( 1 m) in height and can live for centuries.
Giant Barrel sponges are sometimes called “Redwoods
of the Sea.”
—Image by Denise Nielsen Tackett, co-author, with Larry
Tackett, of REEF LIFE, Natural History and Behaviors
of Marine Fishes and Invertebrates (Microcosm/TFH,
Seven reasons why you should
use ReVive Coral Cleaner™
ReVive Coral Cleaner™ is a new type of coral dip
solution for live stony corals. Its formula is based on
powerful plant extracts, but it isn’t harsh on coral tissues
the way iodine-based dips are. For coral dipping prior to
acclimation to aquariums, for rinsing prior to shipping,
and for dipping newly fragmented corals, such as at
coral farming facilities.
What’s the seventh reason? ReVive Coral Cleaner was
developed by Julian Sprung, you know, the guy who
wrote the books... yes, that guy!
Two Little Fishies
Advanced Aquarium Products