Narcosis

This one can be a bit tricky to find. During Chapter 7, “Follow Procedure”, you will cross a lava field with your thrusters. One over, you will enter a cave full of lovely spiders. Follow the path until you see a cuttlefish being chased to the left by a crab. Distract the crab with a flare and pass him on the left. You will then see this situation again, the crab and cuttlefish going to the right this time. Pass him on the left and follow the cave around. Just before you drop down a hole to another level, look to the left and you should see the corpse of a cuttlefish. Look directly at it and this one should unlock. It is quite hard to see due to the colour and the fact there are crab parts all around, but it is definitely there!