Damn that's not a nuchal hump. It's a straight kok.
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I fail to see how a tumor looking thing the size of your fist is meant to look 'awesome'. Maybe I'm missing something but damn it would be a pain in the arse having to cart that thing around with you 24/7. JMO.
.......Nice fish. I will post a pic of my xiloensis. IT does not have a kok like that, but he drives a nice big 4 wheel drive.