Because in nature JDs most common predators are birds and reptiles,

their shyness is ingrained and well founded, most people keep them quarters that are too small, which exacerbates the shyness, and brings out aggression.
Where I snorkel with them, the average depth is 4ft or more, and they can dash into caves at the slightest shadow of a bird or anything else.
They are also quite social with other JDs, because the space allows, and only seem aggressive when protecting spawning sites.


their shyness is ingrained and well founded, most people keep them quarters that are too small, which exacerbates the shyness, and brings out aggression.
Where I snorkel with them, the average depth is 4ft or more, and they can dash into caves at the slightest shadow of a bird or anything else.
They are also quite social with other JDs, because the space allows, and only seem aggressive when protecting spawning sites.