What is "estral beach"

Population (2000): 486
Housing Units (2000): 211
Land area (2000): 0.494048 sq. miles (1.279579 sq. km)
Water area (2000): 0.003363 sq. miles (0.008710 sq. km)
Total area (2000): 0.497411 sq. miles (1.288289 sq. km)
FIPS code: 26460
Located within: Michigan (MI), FIPS 26
Location: 41.985905 N, 83.236038 W
ZIP Codes (1990):
Note: some ZIP codes may be omitted esp. for suburbs.
Headwords: