||Looks the same as the Goldfish Bowl in The Thieves Guild Quest.
To get a Goldfish Bowl with a fish, you need to take an empty goldfish bowl underwater (Calassa - passage from Captain Max, Liberty Bay, Sunken Quarter in Yalahar, Frozen Trench on Tyrsung and Sea Serpent Area - passage from Captain Haba, Svargrond), and "use" it on a patch of coral or seaweed with a fish swimming in it. After you used the empty bowl on the fish you will have a goldfish inside the goldfish bowl. This is how the fish looks like:
Click Here to Show/Hide Spoiler Information
Spoiler warning: Quest and/or game spoiling details follow.
Spoiler ends here.