Temperature-induced changes of growth and survival in the early development of the seahorse Hippocampus guttulatus

► First assessment of temperature effects in early developing seahorses ► Modelling of growth for 3 time scales: days, day degrees and effective day degrees ► Suitability of effective day degrees as a temperature-independent index for growth ► Growth models for temperatures in the range of 14-26 °C are provided. ► Optimal temperatures for the rearing of the species are provided.