[DöubleHelix]

Once you reach maximum pain level, there is no more, and you kind of lose your mind.  It's like a psychological meltdown.

That's something I've never heard before. Sounds interesting (I find insanity interesting). XD

[dueljetty]

The scientific evidence shows that fish DO feel pain.

They have the same basic nervous system as all other vertebrates, as well as the neural structures associated with pain perception. They also respond behaviourally to pain- they move to the bottom of the tank and sit still. If you give them morphine, they start swimming around normally again.

They are also very intelligent- fish can count, learn tricks, recognise each other and have an excellent memory.

If you want some light reading, check out Do Fish Feel Pain? by Victoria Braithwaite.

For scientific literature, see:
Dunlop, R., Millsopp, S., & Laming, P. (2006). Avoidance learning in goldfish (Carassius auratus) and trout (Oncorhynchus mykiss) and implications for pain perception. Applied Animal Behaviour Science, 97(2-4), 255-271.
Sneddon, L. U., Braithwaite, V. A., & Gentle, M. J. (2003). Novel object test: examining nociception and fear in the rainbow trout. Journal of Pain, 4(, 431-440.
Sneddon, L. (2007). Assessing pain perception in fish from physiology to behaviour. Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 146(4, Supplement 1), S78-S78.

[lambosnape]

If I am a fish, I will.... :-'(
In China, I ever saw some kinds of fish food ...
It directly fried the fish's body(except its head) ...
So horrible!!!:((((