For characters with a tail noticeably longer than their legs.
In the case of monster girls or other characters with a single "tail" in place of legs, use your judgment on what constitutes "long" for their kind. For example, a mermaid with a tail noticeably longer than human legs would fit this tag, while a lamia might need a tail three times as long as human legs to stand out.
If it's a close call in your mind, err towards not using this tag.
