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Quiz about Freshwater Fish and Fishkeeping
Quiz about Freshwater Fish and Fishkeeping

Freshwater Fish and Fishkeeping Quiz


Some more stumpers about tropical fish that are generally available on the market --and things we do to keep them happy.

A multiple-choice quiz by hawgshoes. Estimated time: 6 mins.
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Author
hawgshoes
Time
6 mins
Type
Multiple Choice
Quiz #
119,681
Updated
Dec 03 21
# Qns
10
Difficulty
Difficult
Avg Score
4 / 10
Plays
2145
Last 3 plays: Guest 90 (5/10), gogetem (8/10), Guest 98 (4/10).
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Question 1 of 10
1. Which aquarium resident was the first fish to get its entire genome mapped? Hint


Question 2 of 10
2. Only a few freshwater fishes bear fully-formed young. Besides the familiar guppy, platy and molly, livebearers include Hint


Question 3 of 10
3. These beauties were first found on the lower slopes of Pai-yun Shan, near Guangdong (formerly Canton), China, traditionally by a good man named Tan. Hint


Question 4 of 10
4. How would you best characterize Otocinclus, the miniature Loricariid catfish? Hint


Question 5 of 10
5. Your Harlequin Fish are behaving strangely. One is turning upside-down and quivering under a plant leaf. Hint


Question 6 of 10
6. Not all skin parasites ("ectoparasites") are single-celled protists. For instance, some minute flatworms, multicellular animals, that attack skin and gills are Hint


Question 7 of 10
7. You know that filtration may be mechanical, chemical or biological. Most filters combine more than one function. Though "redundancy" is a good thing, an example of a purely mechanical filter medium would be Hint


Question 8 of 10
8. Don't try to tempt Schomburgk's Leaf Fish with regular fish flakes. It's only interested in Hint


Question 9 of 10
9. Angelfish have some close cousins among South American cichlids. These include ________ . Hint


Question 10 of 10
10. Endler's Livebearer comes from Venezuela. Fears about its survival do *not* include fears Hint



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Most Recent Scores
Mar 27 2024 : Guest 90: 5/10
Mar 25 2024 : gogetem: 8/10
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Score Distribution

quiz
Quiz Answer Key and Fun Facts
1. Which aquarium resident was the first fish to get its entire genome mapped?

Answer: Zebra Danio

The Zebra Danio is widely studied to unravel vertebrate development. In a segment of "Scientific American Frontiers," actor Alan Alda visited a lab with 150,000 Zebra Danios to discuss the gene-sequencing project. Endler's Livebearer is a close relative of the familiar guppy.
2. Only a few freshwater fishes bear fully-formed young. Besides the familiar guppy, platy and molly, livebearers include

Answer: Gambusia, the mosquitofish.

The rapidly reproducing Gambusia affinis is still being introduced in waters where it's not a native, to control mosquitoes-- sometimes with devastating results to rare endemic fishes. "Barbus viviparus" was a biologist's gaffe; the fry in its body cavity had been a last meal! All of our native darters are oviparous ("egg-layers").
3. These beauties were first found on the lower slopes of Pai-yun Shan, near Guangdong (formerly Canton), China, traditionally by a good man named Tan.

Answer: White Clouds

The revered Pai-yun Shan translates as "White Cloud Mountain," which the fishes' scientific name simply retranslates into Latin, as Tanichthys ("Mr. Tan's fish") albonubes ("White Cloud"). "Lower slopes" might have given it away. Though "good" might have the ring of ancient myth, the discoverer, Mr. Tan, was a scout troop leader. Would you really call Gyrinocheilus aymonieri, the Chinese Algae-Eater, a beauty?
4. How would you best characterize Otocinclus, the miniature Loricariid catfish?

Answer: omnivore

A detritivore eats semi-decayed detritus: so, would a "dentivore" eat other fishes' teeth? A piscivore specializes in eating other fish. An omnivore eats a little of everything. While a Loricariid will happily eat vegetation, they also like a meal of bloodworms and the like, making them omnivorous.
5. Your Harlequin Fish are behaving strangely. One is turning upside-down and quivering under a plant leaf.

Answer: It is spawning.

Unlike conventional egg-scattering rasboras, our Harlequin Fish deposits a few sticky eggs at a time on the underside of a broad leaf, where egg predators may not notice them. This soft water southeast Asian enjoys the softest, salt- or other electrolyte-free water you can provide. Water retention, often a terminal symptom, can make a fish lose its balance. or even float at the surface. Fish suffering from gill parasites often "flash" their belly as they turn to rub their inflamed gills on a hard surface.
6. Not all skin parasites ("ectoparasites") are single-celled protists. For instance, some minute flatworms, multicellular animals, that attack skin and gills are

Answer: Dactylogyrus flukes.

The skin and gill flukes are several species of all-but-microscopic parasitic flatworms. The other pests are two ciliates and Piscinoodinium, a flagellate that can do a little photosynthesizing to keep it going while it searches for a host.
7. You know that filtration may be mechanical, chemical or biological. Most filters combine more than one function. Though "redundancy" is a good thing, an example of a purely mechanical filter medium would be

Answer: diatomaceous earth.

Fine-grained diatomaceous earth polishes the water to brilliant clarity but rapidly clogs, and you discard it. It's purely a mechanical filter, filtering minute particles. Fresh carbon adsorbs dissolved pollutants as a "chemical" filter but soon develops a bacterial biofilm and so becomes part of the biofilter.

The undergravel filter always combines mechanical filtration with extensive surfaces for bacterial biofilter. Hydrogen peroxide is a powerful oxidizer, but not a filter in any sense.
8. Don't try to tempt Schomburgk's Leaf Fish with regular fish flakes. It's only interested in

Answer: live baby guppies and other living food.

The Leaf Fish, Polycentrus schomburgki, will only strike at small living fish. Disguised as a brownish floating leaf, even to an extension on its lower jaw like a leaf stem, it drifts towards its prey. Then its huge, extensible mouth opens, and the small fish is sucked in.
9. Angelfish have some close cousins among South American cichlids. These include ________ .

Answer: all of these

These laterally-flattened and widely-distributed New World cichlids are all closely related, in the sub-group called "Heroine" cichlids-- more "like the genus Heros" than "like Jane Eyre," eh. Though their exact relationships are being challenged and discussed, the "Heroine" tribe are generally considered to include also the many Central American cichlids that you might still think of as "Cichlasoma" species.
10. Endler's Livebearer comes from Venezuela. Fears about its survival do *not* include fears

Answer: that it is becoming naturalized in Florida's Everglades.

The few Endler's Livebearer, Poecilia species, first released on the market were all males, so the temptation has been to breed them with guppy females. The small coastal lagoon where they were first discovered has been partially filled. The species has not yet been reported from Florida's waters, where many other tropical fish have become feral intruders.
Source: Author hawgshoes

This quiz was reviewed by FunTrivia editor crisw before going online.
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