Sampling was focused at the southern end of Big Lagoon near the Humboldt County
Big Lagoon Park boat launch, near the mouth of the small unnamed tributary. Tidewater
gobies were sampled with a 3.3 m x 1.3 m x 0.158 cm mesh seine with leads spaced every
10 cm in depths between 0.5- 1.5 m. Approximately 100 gobies were sampled on a
monthly basis for 14 months. Total length (TL) was recorded to the nearest mm. During
each sampling period, surface temperature and salinity were also measured (depth
< 1 m); temperature was recorded to the nearest °C and salinity to the nearest ‰ using
a refractometer