2. If you maintained a separate "species" aquarium for each and every genuine species of fish scientifically described so far, both in freshwater and in the seas, how many tanks would you need? a) More than 90,000 aquariums. b) Just over 12,000. c) About 26,000 or so. d) About 7 or 8000.
3. The closer you look, the more kinds of tiny worms you see in the aquarium, all less than half an inch long. Some glide along the glass. Others thrash in mid water. Still others work through the gravel. None of them is a) a parasite. b) a planarian. c) an invertebrate. d) a nematode.
4. The phrase "balanced aquarium" is about a hundred and fifty years old. It refers to the balance between carnivores and herbivores. of the nitrogen cycle. between carbon dioxide and oxygen production. of fish species in a harmonious community.
5. This fish is know as being an effective insectivore in areas known for disease spread by mosquitos.in fact many people who don't even own an aquarium know of it. Corydoras Panda" Tinfoil Barb Swordfish Guppy
6. Four of the barbels stem from the base on the upper lip. They have three vertical stripes - one across the head and the other two across the body. Some species are active at dusk, others are nocturnal and they are extremely difficult to sex. a) Panda Cory b) Khuli c) Clown Loach d) Tiger Barb
7. This disc-shaped Amazonian fish has two long ventral fins. It is striped and is very difficult to sex. Probably one of the most easily recognizable fish by non-aquarium owners. a) Angelfish b) Dwarf gourami c) Blue cichlid d) Spiny eel
8. This fish has an electric organ that allows it to transmit microvoltages. Its brain is exeptionally large in proportion to other fish and it is believed to be very intelligent. a) Clown Loach b) American Flagfish c) Tropheus Moori d) Elephantfish
9. One of the most colorful South American dwarf cichlids. The females get pink bellies when gravid and they usually spawn on a flat rock or a pit in the gravel. They prefer acidic water. Kissing gourami German Blue Ram Plecostomus Kribensis
10. These fish are used in 'fighting' contests in Thailand and can wrestle for up to an hour. The mouth can be used to steer and balance and they are excellent jumpers. Hatchetfish Siamese fightingfish Swordfish Halfbeak