HUBUNGAN KERAPATAN LAMUN DENGAN KELIMPAHAN BULU BABI (Echinoidea) DI PANTAI PANCURAN TAMAN NASIONAL KARIMUNJAWA, JEPARA The Correlation of Seagrass Density with Abundance of Sea Urchins (Echinoidea) in Pancuran Beach Karimunjawa National Park, Jepara Download