|Release||20 April 2015 (Update)|
|Exchange||435 coins (info)|
|Examine||Construction material. Would make a fantastic ornament for a prawnbroker shop.|
The porthole is an item used to construct the boutique prawnbroker at level 81 Construction, or the mermaid hunter suit at 72 Construction, in the surface area of Aquariums. It is a possible reward from opening a prawn ball at a 7/100 chance and can be traded between players.