Shellfie

Shellfie is a song by Chirpy Chips.

Description
Shellfie was one of four songs added in the version update of. Like all battle songs, it has a random chance of being played during online matches. It starts with a rapid, up-tempo beat and is mainly is composed of synthesizers and chiptune sounds. The opening verse is sung and quickly changes to a call-and-receive style, where one line is sung and then echoed back before some of the opening vocals are repeated. This is followed by a fast-paced chiptune instrumental, one final line of singing, and a short synthesiser break with chanting over the top before the song loops. It can also be heard in Squid Beatz.

In, Shellfie can be unlocked to listen in Squid Beatz 2 as a final reward from the  amiibo. It cannot, however, be heard anywhere else in the base game. It has a maximum score of 147 and 226 in Normal and Hard modes, respectively.

Shellfie (Inkredible New Stages and Gear)
An alternate version to Shellfie was heard during the Inkredible New Stages and Gear trailer, and plays after a remix of Splattack while revealing Mahi-Mahi Resort. It remains mostly the same as the original but has a new, definite ending to the song. The backing soundtrack to the entire trailer without any sound effects was released in Splatoon Live in Makuhari, which also includes the first half of the Splattack! remix as one file.

Etymology
Shellfie is a marine-based pun on 'selfie'.