Blend of vegetarian +‎ aquarian or similar.

vegaquarian (plural vegaquarians)

1. (rare) A vegetarian who eats fish.
   • 2008, Laura Solomon, Alternative Medicine, page 2:

     Three years previously, at her insistence, the whole family had turned pescatarian or vegaquarian; call it what you will, we ate only fish and veges.

   • 2011, Janet Bond Brill, Prevent a Second Heart Attack: 8 Foods, 8 Weeks to Reverse Heart Disease‎^[1]:

     I urge you to become a “vegaquarian” and mend your broken heart by following the Prevent a Second Heart Attack plant/fish protein philosophy.

   • 2011, Charlotte Hilton Andersen, The Great Fitness Experiment: One Year of Trying Everything‎^[2], page 135:

     I decided to continue to incorporate some meat, especially fish, into my diet on a semi-regular basis, thereby becoming what I describe as a “vegaquarian”—although all the cool kids are saying “flexitarian” these days.

   • 2014 November, Pure Slush, volume 11:

     She has various animals including a flockette of pet sheep that are thankful for her vegaquarian habits.

• pescetarian