I see you've put a link to the Trident Marwan.
The Prowler 15 and the Prowler Trident are different Yaks. The Trident is the latest Ocean out there and has a nice hatch between your legs that you can put a 6ft fishing rod in no problems, so your fins and gun will be just fine!
How'd you like the Scupper Sunfish? I'm torn between one of them and spending a lot more on one of these:
Kayak UK - home of Kaskazi Kayaks in the UK