Illustration of an open barnacle
Unicode: 1F4D5
Unicode: 1F4EA
Unicode: 1F4EB
Illustration of 2-dimensional coastline base of a closed estuary with nearshore reefs
Illustration of closed and shallow estuary base
Illustration of closed estuary base with deep channel
Illustration of closed estuary base with offshore sandbars
Illustration of seasonally closed estuary base
Unicode: 1F61A
Illustration of closed and stratified lagoon base
Unicode: 1F512
Unicode: 1F510