Salinity
salt content of water (C3, M3)
Ground water
water that flows through naturally porous or fractured rocks and soils beneath the surface of the land; also, water trapped between dikes (vertical, underground sheets of volcanic rock) or floating on seawater within rocks (C3, R1)
Emergent land
land that comes out of the water, an island (C3)
Anchialine pond
a brackish or saltwater pool with no surface connection to the ocean (C3)
Adaptation
a change in an organism or species that enables it to survive in a particular habitat (A3, C3, R3, M2, M3)