What does this symbol mean? Noob question.

[Eirva]

While we're on the topic of symbols, what does this one mean?



I've only ever noticed it on the Dune Anglers outside Forgotten Springs.

While this is specifically a quest mob, the symbol is an indication that it is stronger than a normal enemy of the same type and level. Enemies with this symbol are meant to be weakened with items provided by the quest with which they are associated.