small bump under fish's mouth

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egonzal

Jack Dempsey
MFK Member
May 26, 2010
57
2
38
never never land
the shop down the street has a clown knife with a bump right under its mouth/jaw. any idea what that is? i was thinking some sort of fat deposit
 
Chimple. Often from rubbing on substrate.

Some say it's a parasitic cyst.
 
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