Breaking radio silence, I'm still alive,
In SF and San Pablo Bay (and Suisun and Grizzly Bays to some extent), staghorn use tidal marshes as nursery habitat, while white croaker spawn and rear in the Bay before moving out into oceanic waters. Given the widespread destruction/degradation of tidal marshes and extreme changes to the estuary's food web, it's not surprising both have declined. Also, the adults historically moved into the Bay in coldwater years, taking refuge in warmer bay water from cold oceanic water. Given rising oceanic water temperatures, both species don't particularly need to make that migration anymore. There's still an ungodly number of staghorns in the Bay (especially in Raccoon Strait and Treasure Island), but certainly not as many in shallow habitats as in years past. As for white croaker, they're around seasonally, but some senior CDFW SF Bay Study employees have also noticed a decline in numbers of adults. And generally a decline in native fishes and invertebrates over the years. Sure is really telling about the environmental state the Bay is in.