Artist. Formerly tagged as sakana_(pixiv).

Japanese name: 魚田 魚 (Uota Sakana) (reading is a best guess)
The other name: さかな (Sakana)

See also

• Pixiv account: http://www.pixiv.net/member.php?id=2843
• Twitter account for Pixiv Succubus project: http://twitter.com/forun_picsuccu