Rivers - Fish
A close-up of a fish that will lie very still for long periods waiting for prey and strike with swift acceleration. Question 9 will ask you to identify it

Rivers - Fish

Fish have been here for more than 450 million years, even before the dinosaurs started to roam around. Some fish can swim backwards. Goldfish originated in China but are now all over the world. The lifespan of a goldfish in ideal conditions can be up to 20 years.

The following picture quiz looks at freshwater fish specifically - those fish that live in rivers and lakes. If you have a fish pond in your garden, you may do rather well in this quiz! If you wish to get a closer look at the fish, just click on the image to enlarge it. Good luck!

  1. Can you identify this fish?
    4 -
    Photograph courtesy of Karelj
    • Order: Cypriniformes
    • Family: Cyprinidae
    • Genus: Rutilus
    • Species: R. rutilus
    • A blueish silvery-coloured fish.
    • Can be recognised by a big red spot in the iris above and beside the pupil.
    • Feeds in deeper parts of water.
    • Tolerates organic pollution particularly well and is one of the last species to die in such circumstances.
  2. Can you identify this fish?
    2 -
    Photograph courtesy of Karelj
    • Order: Cypriniformes
    • Family: Cyprinidae
    • Genus: Tinca
    • Species: T. tinca
    • Has very small scales, making it as slippery as an eel.
    • In folklore it is said that this slime cured any sick fish that rubbed against it.
    • For this reason, the fish is also known as 'doctor fish'.
  3. Can you identify this fish?
    1 -
    Photograph courtesy of Sven.petersen
    • Order: Cypriniformes
    • Family: Cyprinidae
    • Genus: Barbus
    • Species: B. barbus
    • The eggs of this fish are poisonous.
    • Was once called the 'pigfish' in folklore.
    • Is a very popular sport fish.
    • Angling societies exist which specifically promote the pursuit and conservation of the species.
  4. Can you identify this fish?
    4 -
    Photograph courtesy of Seotaro
    • Order: Cypriniformes
    • Family: Cyprinidae
    • Subfamily: Acheilognathinae
    • Genus: Rhodeus
    • They depend on freshwater mussels to reproduce, therefore their range is restricted.
    • Parents transfer responsibility for the care of their offspring by depositing eggs into the mantle cavity of the mussels.
  5. Can you identify this fish?
    3 -
    Photograph courtesy of Leonard G.
    • Order: Cypriniformes
    • Family: Cyprinidae
    • Genus: Cyprinus
    • Species: C. carpio
    • Native to Asia but introduced to most parts of the world.
    • Was domesticated between the 13th and 16th centuries by monks as food.
    • The eggs are used for caviar in the United States.
  6. Can you identify this fish?
    1 -
    Photograph courtesy of Heptagon
    • Order: Cypriniformes
    • Family: Cyprinidae
    • Genus: Carassius
    • Species: C. auratus
    • One of the earliest fish to be domesticated.
    • Also, one of the most commonly kept aquarium fish.
    • If left in the dark for a period of time, they will gradually change colour until they are almost grey.
  7. Can you identify this fish?
    2 -
    Photograph courtesy of J.C. Harf
    • Order: Cypriniformes
    • Family: Cobitidae
    • Genus: Cobitis
    • Species: C. taenia
    • Can be spotted near flat and sandy or stony areas, often in large numbers.
    • In the daytime, they bury themselves in the bed with just the head and tail peeping out.
    • Feeds and is most active at night.
  8. Can you identify this fish?
    4 -
    Photograph courtesy of Allie_Caulfield
    • Order: Siluriformes
    • Family: Siluridae
    • Genus: Silurus
    • Species: S. glanis
    • A large fish which can reach up to 3 m (9.8 ft) in length.
    • It catches prey by using its fins to create an eddy to disorient the victim.
    • Has very good hearing.
  9. Can you identify this fish?
    2 -
    Photograph courtesy of www.lucnix.be/main.php
    • Order: Esociformes
    • Family: Esocidae
    • Genus: Esox
    • Species: E. lucius
    • Found in slow streams and shallow, weedy places in lakes.
    • They lie very still for long periods waiting for prey and strike with swift acceleration.
    • Are cannibalistic.
  10. Can you identify this fish?
    3 -
    Photograph courtesy of Karelj
    • Order: Cypriniformes
    • Family: Cyprinidae
    • Genus: Squalius
    • Species: S. cephalus
    • Due to their readiness to feed (and therefore be caught) they are popular with anglers.
    • Renowned for their fierce appetite and will take baits such as cheese and sweetcorn!

Author: Sarah Garratty

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