Figure 2From: Developmental and light-entrained expression of melatonin and its relationship to the circadian clock in the sea anemone Nematostella vectensisSerotonin content in Nematostella vectensis embryos cultured in a light–dark (12:12 h) cycle. Samples from 48-h (a), 1-week (b) and 2-weeks (c) post-fertilization.Back to article page