E11 is a clone of the cell line SSN-1 and is persistantly infected with a C-type retrovirus (SnRV). It is susceptible to piscine nodavirus strains belonging to different genotypes (SJNNV, RGNNV, TPNNV and BFNNV - striped jack, red spotted grouper, tiger puffer and barfin flounder nervous necosis viruses repectively). E11 is highly permissive to nodavirus infection and production. An advantage of E11, over the parental line SSN-1, is its steady, faster growth to confluency and longer stability in monolayer cultures for 2 weeks at 25°C or 4 weeks at 20°C and its reproducible, clear CPE characterised by cytoplasmic vacuole formation followed by intensive disintegration.