BUR #3521 has been approved by @evazion.
create implication shark_tail -> tail
A pretty straightforward implication. Other animal tails imply tail, so shark_tail shouldn't be an exception when in all the posts tagged with it, it's shaped like an actual tail and not just fins attached to a character. Examples include post #3844628, post #3555495 and a fair amount of Gawr Gura posts. (post #4110570, post #4110399).
EDIT: The bulk update request #3521 (forum #173310) has been approved by @evazion.
Updated by DanbooruBot