Steal Arowana Fish

In Bangkok, there are two friends named Finn chan and Niran. They are selling rare fishes. One day, they found an Arowana fish which makes them a good fortune, When Niran asked Finn chan to sell it to good deal, he refused and kept it as a lucky fish. After some days Niran came to know about Finn that he is going to start an Aquarium shop on his own. Niran asked Finn about the source for that money, but he refused to tell the truth. Now Niran found out the truth. Finn is going to sell the Arowana fish secretly to a pirate for a good amount of money. Now Niran has to search the Aquarium to find out the Arowana fish before it sold out to the pirates. Help him to find out the Arowana Fish and escape him from there.