Asthenomacrurus victoris (Victory Whiptail)

Asthenomacrurus victoris, or Victory Whiptail, is a rattail and also is one of the two species of the genus Asthenomacrurus. This rattail fish can be found in Australian waters. their structure is similar looking to tadpoles, or baby/juvenile frogs.

Resources
http://www.fishesofaustralia.net.au/home/species/3598 (Image, info)