Last month, for World Wetlands Day, we tested just how well South African's knew their wetlands and rivers - the vital lungs of our cities and societies. Did you know your carp from your kurper? Your beds from your banks? Your rills from your gills?

Congratulations to Estienne van Zyl and Amy Rossenrode for each winning a pair of Aquarium tickets in this month's draw!

The answers to the quiz are below, but you can try it for yourself first here if you like. Here's a cartoon to distract you from cheating...

1. We asked: Which of these South African freshwater fish is actually an invasive alien species?

Answer: Carp

The common carp (Cyprinus carpio) is an invasive alien species, originally native to Europe and Asia, introduced into many South African waterways. Moggel, kurper and banded tilapia are all indigenous to South African waterways.

2. We asked: What is the date of World Wetlands Day?

Answer: 2 February

The Convention on Wetlands of International Importance was adopted in Ramsar, Iran, 46 years ago, on 2 February 1971. That date is now celebrated globally as World Wetlands Day.

3. We asked: Which group of animals has an extinction rate more than six times higher than other species?

Answer: Freshwater fish and insects

That's just the low estimate. In North America the estimate extinction rate for freshwater species is 877 times higher than normal! The IUCN have identified freshwater fish as the most threatened group of animals on Earth.

4. We asked: Which of these is a function of wetlands?

Answer: All of them!

Wetlands are vital to life - they purify water, prevent floods, provide shelter for young fish and protect biodiversity.

5. We asked: Where does most of Cape Town's drinking water come from?

Answer: River catchments

The Berg and Riviersonderend river catchments supply water to the Theewaterkloof, Wemmershoek, Steenbras, Voelvlei and Berg River Dams - which account for 99.6% of the Western Cape's water supply. Other water sources, as well as water from the smaller river catchments are being investigated more closely due to the ongoing drought.

6. We asked: Which of these could you expect to see in the "riparian zone"?

Answer: Trees

The riparian zone is the strip of land that is directly next to a stream or river. It is usually populated with water-loving plants and trees.

7. We asked: What freshwater insect is this?

Answer: Water scorpion

Water scorpions are insects that live almost completely underwater. Despite their appearance, they are not related to scorpions and do not possess a sting - they use their powerful forelegs to catch other insects, crabs, tadpoles or small fish.

8. We asked: Which of these freshwater fish species can you see at the Two Oceans Aquarium?

Answer: Berg-Breede River whitefish

This whitefish is an indigenous fish that lives in deep rocky pools of the Breede and Berg Rivers in the Western Cape - nowhere else on Earth (well, except for the Aquarium).

9. We asked: What percentage of wetlands have been destroyed by humans?

Answer: 50%

A study carried out by the United Nations Environment Programme found that over the past 100 years, humans had destroyed half of all wetlands. In South Africa, the situation is even direr - 60% of our wetlands have been destroyed.

10. We asked: What can you do to help save the wetlands?

Answer: All of this!

You can take action now to save our wetlands:

• Go an explore a wetland yourself - if you appreciate them, you'll want to save them.
• Use biodegradable products to clean your house, laundry and yourself.
• Save water - one drop wasted is a drop that didn't need to be removed from the ecosystem.
• Tell others about the importance of wetlands!

Competition terms and conditions

1. All content sent to the Two Oceans Aquarium as entry into the competition may be used on the Aquarium’s website and associated digital platforms.
2. Entries close at 13h00 on Friday 2 February 2018 (World Wetlands Day).
3. Winners will be notified via telephone no later than Monday 5 February 2018 at 12h00.
4. To be entered into the lucky draw, all 10 questions must be answered correctly.
5. Two individual winners will be chosen by lucky draw.
6. Each winner will receive two complimentary day tickets to the Two Oceans Aquarium. These tickets will be available at the Aquarium's front desk and are valid for 3 months from the date that winners have been notified.
7. Representatives of the Two Oceans Aquarium will pick the winner from eligible entries.
8. Prizes are non-transferable.
9. Prizes must be redeemed within three months of date of issue.
10. The judges’ decision is final and no correspondence will be entered into.
11. The winners may be required to participate in a photo-taking session during the issuing of the prize.
12. Pictures may be posted online.
13. Entry into the competition and acceptance of any prize shall constitute consent on the winner's part to allow the use of the winner's name, image, voice and/or likeness by the Two Oceans Aquarium for editorial, advertising, promotional, marketing and/or other purposes without further compensation except where prohibited by law.
14. This competition is not open to Two Oceans Aquarium staff or volunteers and their families.
15. Anyone who has won a competition or promotion through the Two Oceans Aquarium in the last six months is not eligible to win.