 The native miscid neomyces merstis was once a major food source for fish in the San Francisco estuary, SFE, but following the introduction of several invasive zooplankton species in the mid-1980s, populations of this native species declined dramatically. In 1993, another invasive miscid species, hypercanthomasis lingerostris, was introduced into the SFE, and it quickly became the most abundant miscid in the upper estuary. To better understand how environmental factors influence the distribution of these two misids, researchers from the California Department of Fish and Wildlife sampled misid abundances in the SFE using a fall mid-water trawl survey. They found that H. lingerostris was found in higher temperatures significantly more often than N. merstis, and there was a trend towards greater frequency of H. Lingerostris at higher salinities. Additionally, increases in water temperature over time, coupled with H. lingerostris smaller size at maturity and lower food needs, may help explain why this species has been so successful in the SFE. This article was authored by Michelle Avila and Rosemary Hartman. We're article.tv, links in the description below.