Originally Posted by Phly
Ok. What's your reasoning behind that? I'm being fun not confrontational.
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From dictionary.com Head | Define Head at Dictionary.com
1. The upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth. 2. The corresponding part of the body in other animals.
So, it's the part of the body containing the eyes, ears, mouth, nose, brain. That is the definition of head, and fish definitely have a part of them that matches that description - it's just not separated by a neck.