TY - BOOK AU - Ryan, Denise TI - Top readers : : Under the sea SN - 9781740898249 AV - PZ7 U1 - 551.46 PY - 2008/// CY - Sydney : PB - Weldon Owen, KW - Ecosystems KW - Ocean Science KW - Habitats N1 - J ; 500 ; Lexile estimate ; J ; Raz-Plus N2 - More of Earth is covered by water than is dry land. Under the oceans are hills and valleys, warm regions and freezing ones. Many creatures live in the shallows, and a few live in the darkest depths ER -