Purple fire goby (photo)
(Nemateleotris decora)

Red fire goby (photo)
(Nemateleotris magnifica)

Purple fire goby and
Red fire goby.Usually purple lives deeper than red and seldom salute in such a way.

Whitecap goby (photo)
(Lotilia graciliosa)

Sailfin shrimpgoby (photo)
(Amblyeleotris randalli)

Sailfin with commensal shrimp(photo)