||There are two types of Goldfish Bowl (With Fish), both are needed for quests. One can be bought from Black Bert and the other can be caught by using an empty goldfish bowl on a small fish.
To catch a small fish, you need to go to underwater areas such as:
Calassa, the Sunken Quarter in Yalahar, Frozen Trench on Tyrsung or in the Sea Serpent Area. You need to use the empty goldfish bowl on a patch of coral or seaweed which has a fish swimming around it. After you used the empty bowl on the fish, you will then have a goldfish inside the goldfish bowl.
NOTE: You cannot buy this item from Black Bert and then turn it in to Rashid!
<spoiler>Item needed for The Traveling Trader Quest (which you use on small fish).
Another needed for The Thieves Guild Quest (which Black Bert sells). </spoiler>