As part of the event, keepers have set up a series of Olympic-themed activities including tiny archery targets for the archer fish
, long jump pits for the frogs and diving boards for the aquarium's tufted ducks - famed for their diving abilities.
Technique: In the wild, the archer fish
shoots down climbing and flying insects using her own version of a water pistol - her mouth.
The mudskippers and spitting archer fish
are part of a new exhibition about life in a mangrove swamp.
An archer fish
spits an arrow of water up to two metres to knock prey from overhanging branches.
In the park's surrounding seas are great clams, clown fish, angel fish, parrot fish, mudskipper, which can climb trees, and archer fish
, which spit water up to two meters in height to catch insects.
It also had sharks with chainsaws on their noses; archer fish
with in-built water pistols "accurate up to two metres" and a worm who traps its prey by "firing lassoes of glue from the side of its head.