Ground
From Inkipedia, the Splatoon wiki
Ground is the default terrain in Splatoon.
Description
The main ground type is concrete, though wood is also used such as large boxes, crates, and planks.
Use
Standard ground can be inked by Inklings to cover turf. Covering the ground is the primary objective of Turf Wars. Ground can be both walked on in human form, or swam in after covering it with ink in squid form.