Hawkin's Cutlass

Imagine FX weekly challenge
Brief:

Create a design for the large carnivorous sea creature known as Hawkin's Cutlass.

Description:

Hawkin's Cutlass is an Eel like fish measuring an average of 2 - 3 meters in length (though larger examples have been witnessed by sailors). The Cutlass has several rows of razor sharp teeth which can extend from it's mouth when attacking. It also has some viscious looking barbs running across it's back. Originally there were thought to be many species of Hawkin's Cutlass due do their varied colouring and markings, but recently it was discovered that the fish have the ability to alter their skin colour at will similar to cephalopods.