pescegan 

Someone who consumes a vegan diet with the exception of fish and seafood.

Similar to a pescetarian (a vegetarian who consumes fish and seafood, but no other animal flesh), a pescegan consumes fish and seafood, but no other animal product (no dairy, eggs).

pescegan by Cupcakebird December 18, 2012

Pescegan 

One whose diet does not include mammals or products made from mammals.

Pescegans are like vegans, but they eat fish.

Pescegan by MissWunderlust November 29, 2018