Exam 2 Vocab Flashcards Preview

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Flashcards in Exam 2 Vocab Deck (39):
1

Crepuscular

A creature that is most active naturally at dawn or dusk.

2

Cayanobacteria

A primitive life form, having some characteristics of algae and bacteria but regarded as different from both. Often called slime algae or blue-green algae.

3

Deionizer

A mains water filter that uses several purifying ion-exchange resins. It removes impurities from ordinary house-hold water.

4

Demersal

Meaning “close to the sea floor”. Demersal eggs are heavier than water and are laid in prepared spawning sites on the seabed. The fertilized eggs are then guarded by one or both adults until hatching occurs.

5

Denitrification

The process in which nitrate is changed by anaerobic bacteria into nitrous oxide and then into free nitrogen gas.

6

Detritus

Unwanted evident waste matter that may build up on the substrate.

7

Diffuser

Another name for an airstone.

8

Diurnal

A creature that is naturally active during the hours of daylight.

9

Dorsal fin

A single vertical fin on a fish’s back; some fish have two dorsal fins, one behind the other. Many marine species have venomous rays in the dorsal fin

10

Feeding stick

A device that enables pieces of food to be held in the aquarium for individual fish, encouraging them to take pieces. Useful for potentially dangerous species

11

Filter feeder

An animal (fish or invertebrate) that sifts water for microscopic food, e.g. pipefish, tubeworms.

12

Filter medium

Used in filtration systems to remove dissolved or suspended organic substances from water.

13

Fluidized bed

A biological filtration method. Unclean water is pumped through a cylinder containing millions of tiny “beads” on which nitrifying bacteria have become established.

14

Foam fractionation

A Method of separating proteinous substances substances from water by foaming action. Also called protein skimming.

15

Fry

Very young fish (see also larvae)

16

Gill flukes

Trematode parasites, such as Dactylogyrus.

17

Gills

Membranes through which fish absorb dissolved oxygen from the water during respiration.

18

Grass shrimps

Small crustaceans used as livefood for some saltwater fish.

19

Gravel tidy

Plastic mesh fitted between layers of gravel to protect biological filtration system from being exposed (and thus rendered ineffective) by borrowing fish.

20

Greenstuff

Plant matter provided as food. May refer two vegetables such as peas or lettuce.

21

Heaterstat

A combined unit for regulating water temperature in the aquarium, consisting of a heater and thermostat, sealed within a glass tube.

22

Hydrometer

A device for measuring the specific gravity (SG) of water, especially vital when making up synthetic saltwater mixes. May be either free-floating or swing-needle type.

23

Hydrophilic

Attracted to water.

24

Hydrophobic

Water-hating.

25

Ick/Ich

A Relatively common parasitic problem seen in marine fish, also known as “white spot” because of the tiny white spots that develop over the body and fins

26

Impeller

An electrically driven propeller that produces water flow through filters.

27

Invertebrate

A creature without a vertebral column, which forms the backbone.

28

Invertebrate-only setup

And aquarium that houses invertebrates, but no fish.

29

Juvenile

A young individual that often may display markedly different coloration than adult fish of the same species.

30

KH

A means of measuring the hardness of water, in degrees on the KH scale.

31

Krill

Marine crustaceans with the shrimp like appearance.

32

Larvae

(1) The first stage of fish development after hatching; underdeveloped fish fry. (2) the first reproductive stage of many invertebrates.

33

Lateral line

A line of perforated scales along the flanks of fish, connected to a pressure-sensitive nervous system, used to detect vibrations in the water.

34

Livefoods

Invertebrates used specifically as fish food, although they may not be of marine origin, and might have been preserved, E.G. frozen.

35

Macroalgae

Seaweedlike algae, which are clearly visible to the naked eye.

36

Marine fungus

An organism that causes cottonwool-like growths on the body. May be linked with a bacterial infection or a Traumatic injury.

37

Meaty foods

General term for food that is of animal rather than plant origins. It rarely describes meat as such in the case of marine fish diets.

38

Melanesia

A group of islands that are in the Oceania group, lying to the south of Micronesia. Includes new guinea the Solomon Islands, Vanuatu, and Fiji as well as New Caledonia.

39

Microalgae

Microscopic algae that lack the obvious form of macroalgae to the naked eye.