Fishie Quiz

Here's the answers to our quiz. Click to return to questions page.

1) Approximately how many species of fish are there worldwide?

ANSWER (B): There are approximately 27,000 known species of fish, easily making them the most diverse group of vertebrates, and scientists estimate that there are still thousands of fish species yet to be discovered!

2) What species of fish produces the most eggs?

ANSWER (A): The ocean sunfish (Mola mola) produces more eggs than any other species of fish. In fact, it produces more eggs than any other vertebrate on the planet. A single female can produce up to 300 million eggs at a single spawning, each measuring about 0.05 in in diameter! Considered a delicacy in Asia, a single mola can fetch prices as high as $600 (U.S.).

3) How many different varieties of goldfish are there?

ANSWER (C): 100. There are over a hundred different varieties of goldfish, classified by color, body shape, finnage and outgrowth of the eyes. Some common varieties of goldfish include the Comet, the Fantail, the Oranda, the Shubunkin, and the Black Moor. Perhaps the most popular of all aquarium fish, goldfish have been known to live up to 25 years!

4) What is the fastest fish?

ANSWER (D): Sailfish. Although it is, of course, extremely difficult to measure the swimming speed of large fish in the wild, the cosmopolitan sailfish (Istiophorus platypterus) is considered by many experts to be the fastest fish in the world. It has been clocked at speeds of 68 mph. The average fish would be hard-pressed to reach 12 mph.

5) What species of fish, dubbed "Frankenfish" by the media, caused a panic among fish farmers when it began invading aquaculture farms in Florida and feeding on fish stocks?

ANSWER (B): The walking catfish, also known as the magur or pla duk dam, caused a panic among fish farmers in Florida when it began invading their aquaculture farms and feeding on fish stocks. Dubbed "Frankenfish" by the media, the walking catfish breathes air and is capable of making short migrations across land.

6) What is the most poisonous fish?

ANSWER (C): The most poisonous fish (to eat) is the puffer fish whose ovaries, eggs, blood, liver, intestines and skin contain a fatally poisonous toxin called tetrodotoxin. A tiny amount of this toxin is enough to kill an adult in as little as 20 minutes. The poisonous puffer fish is considered a delicacy and eaten in Japan, when prepared correctly and the poison removed.

7) In the movie Finding Nemo, what kind of fish is Nemo?

ANSWER (D): In the movie Finding Nemo, Nemo is a clownfish. Due to the popularity of the movie, public demand for pet clownfish nearly tripled after its release.

8) What is the largest species of fish?

ANSWER (C): Whale Shark. Reaching an average length of 45 feet and weighing up to 15 tons, the Whale Shark is generally considered the largest species of fish in the world. One specimen captured in the Gulf of Thailand in 1919 measured an incredible 59 feet! Not related to whales (which are mammals, not fish), the Whale Shark probably earned its name because of its abnormally large size as well as the fact that, like whales, it is a filter feeder, swimming with its mouth open in order to suck up plankton and small sea creatures.

9) What is the smallest species of fish?

ANSWER (B): Stout infantfish. Measuring only quarter inch (about the width of a pencil), the stout infantfish holds the record for world's smallest fish. It lives around Australia's Great Barrier Reef and is thought to have a lifespan of only two months. Prior to the discovery of the stout infantfish, the dwarf goby fish was generally considered the world's smallest fish.

10) How many teeth can a shark grow during its lifetime?

ANSWER (C): 50,000. When a shark loses a tooth, a new tooth grows in to replace it. In fact, below each tooth (inside the gums) are up to 7 layers of replacement teeth, just waiting to grow in. Some species of sharks have been known to shed as many as 50,000 teeth during their lifetime!

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