- Source: Longtail dragonet
The longtail dragonet (Callionymus gardineri) is a species of dragonet native to the western Indian Ocean. It can be found at depths of from 30 to 180 metres (98 to 591 ft). This species grows to a length of 28 centimetres (11 in) TL. The specific name honours the British zoologist John Stanley Gardiner (1872–1946).