Aciagrion fragile

Aciagrion fragile is a species of damselfly in the family Coenagrionidae, commonly known as a blue slim. It is a small, slender damselfly, the male is blue and black. It has been recorded from northern Australia, New Guinea and the Lesser Sunda Islands in Indonesia, where it inhabits still waters and swamps.

Etymology
The species name fragile is a Latin word meaning fragile, or easily broken. In 1906, Robin Tillyard named this species probably in contrast to other members of the genus Ischnura, where it had been provisionally placed. While the name was originally spelled "fragilis", the ICZN mandates that species names that are adjectival must agree in gender with the genus name, so when this species was moved to the genus Aciagrion, which is neuter in grammatical gender, the spelling of the species name changed to fragile.