Galvanising: Process by
which iron is coated with zinc.
Gas bladder: A gas-filled
sac found in many fishes. Gas bladders help
provide buoyancy; they're also called swim
Gastropod: A group of
molluscs that travel on a single, muscular
foot and often secrete a one-piece shell
for protection. Snails, slugs, limpets and
abalones are all gastropods.
Gear limits: Management
term used to limit the type of fishing gear
used by fishers.
Gender limits: Fish protected
by sex, e.g. female mudcrabs are protected
by law from being taken by fishers.
Genera: A collective
term used to incorporate like-species into
one group. The first part of the Latin name
of any creature refers to the genus.
Genus: In biology, a
category that's part of the scientific system
for grouping together related plants, animals
and other organisms (kingdom, phylum, class,
order, family, genus, species). Genus is
the category that ranks below a family and
above a species.
Geology: The scientific
study of rocks, the earth's crust and the
Gill: An organ that an
animal uses to breathe under water. Gills
absorb oxygen from the water.
Gill covers: The tough
flaps of tissue that cover a fish's gills.
Gill net: A type of fishing
net that catches fish by their gills or
Global positioning system (GPS):
An electronic system that uses
signals from satellites to locate things
far below on the surface of the earth or
ocean. GPS technology is being used to make
very accurate new maps of the earth and
ocean. GPS devices let scientists and fishers
find their way very precisely.
Godwit: A long-legged
shorebird with a very long, straight bill.
Golden-eye mysid: A shrimp
like animal that lives on the seafloor.
The golden-eye mysid was named for the way
its eyes reflected the lights of remotely
operated vehicles (ROVs) exploring the deep
Gondwanaland: A hypothetical
protocontinent of the Southern Hemisphere,
named for the Gondwana region of India,
which included the present continental masses
Africa, Antarctica, Australia, India and
Goofy foot (surfing):
Refers to stand up surfers who put their
right foot forward when surfing.
Gorges: Fish hooks without
curves, made from bone.
Gorgonian: A member of
a group of corals that grow in tree like
shapes; some live in cold, deep water and
grow very slowly.
Force of attraction between two objects.
Gravity: A force of attraction
towards the centre of objects.
Greases: Thick oily substances
used to lubricate marine parts.
Greenhouse effect: A
build-up of carbon dioxide, methane and
other gases in the atmosphere preventing
heat from escaping from Earth.
Grow-out farms: Places
where adult aquaculture animals are raised
until they are harvested.
Groynes: Boulders placed
by humans that jut out to sea to capture
sand and form a beach. Found to be ineffective
because they only cause erosion on the opposite
side of the rock wall.
Guano: The droppings
of birds or bats. In some places, like penguin
colonies, huge deposits of guano build up
over many years. People sometimes harvest
this guano to use as fertilizer for farms
Guitarfish: A flattened
fish in the shark family, not quite as flat
as a skate or ray.
Gulfs: Portion of sea
partly enclosed by land.
Gullet: The throat.
Gunwale: The upper edge
of the side of a boat.
Gutting: Removing intestines
and other internal organs of a fish.
Gyres: Currents moving
in large circles in the Northern and Southern