In this study the aim was to investigate how incubation temperature effected lumpsucker eggs and larvae; by comparing early cell symmetry, egg/embryo development, mortality, hatching success and early larvae size weight and histomorphology. Two batches of eggs were incubated at 3 temperature regimes; 1- Ambient seawater 4-6°C (cold), 2-Ambient seawater for 10 days then gradually increased to ...