This book presents a comprehensive review of various biological and ecological studies in animal science, including their embryology, evolution, classification, habitats and distribution. Topics discussed herein include the challenges of developing a treatment that protects shrimp against WSSV infection; patterns in the diversity of grassland butterfly communities; artificial polyploidisation in cultivated shrimp; the behaviour, ecology and conservation of butterflies; arrhythmia in behaviour and cyclic processes of cardiovascular and respiratory systems of phocids; guinea pig behaviour and response; and hydatidosis in sheep.