When maritime creatures cooperate, the catch of the day becomes the tentacle-sex orgy of the week:

The artwork is by Knucklecurve (ﾅｯｸﾙｶｰﾌﾞon Pixiv) and it may be seen on Pixiv. (Pixiv’s age-verification login required.) An additional gallery of work by Knucklecurve may be found on Danbooru; a slightly larger one is available on Sankaku Complex.

This image is a reblog from a 2 January 2013 post at Infernal Wonders. Its original source is the tumblr It’s Game Over For These Girls. Poor girls!