The wingspread of the adult is 9 to 11 mm. Undersides of wings are brown with a row of submarginal black spots with white highlights and are patterned with numerous white dashes and a submedian row of white circles. Upper sides of wings are brown with black spots without highlights. Eastern pigmy blue eggs are pale blue-green. The larvae are green with small white tubercles that closely match the pattern on the glasswort host plant.
Pupae are variable but usually yellow-brown with darker brown dots.
There are many flights all year in Florida. Males patrol near host plants and courtship occurs in late afternoon. The primary larval host plant is annual glasswort, Salicornia bigelovii Torr. Perennial glasswort, Salicornia perennis Mill. Opler, P.A. and G.O. Krizek.