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Water clarity and eelgrass

Posted: Sat Mar 21, 2026 7:36 am
by Gotfish?
Have others noticed the bay seems a lot murkier with less eelgrass than previous years?

Lack of eelgrass can decrease water clarity since the roots hold in sediment that is otherwise stirred up by the tides. And there is a positive feedback mechanism in that poor water clarity reduces the maximum depth eelgrass can survive in.

Yesterday, the water temperature got to 68F at Coronado bridge. 68F is supposed to be the upper range for optimum temperature for eelgrass and it is only going to get warmer in the summer. Pretty warm for what was officially the 1st day of spring (vernal equinox).

Less eelgrass isn't good for fishing, at least for most species (maybe not mud marlin).

https://www.google.com/search?q=eelgras ... e&ie=UTF-8

FYI, I had 19 spotted bay bass, 1 corvina, 3 short halibut and 2 lizard fish yesterday, launching from Bayside in my tube. Slower than most years. Got a lot of short strikes, maybe a good year for lizard fish.

Re: Water clarity and eelgrass

Posted: Sat Mar 21, 2026 7:37 am
by Gotfish?
Correction, I launched from Tidelands.

Re: Water clarity and eelgrass

Posted: Sat Mar 21, 2026 8:23 am
by inthedeep2
Yes, eelgrass makes a difference. Lizardfish are everywhere in large numbers. I wonder how the influx of lizardfish has been on all the juvenile bass and other fish in the bay. I have had some pretty crappy days throughout the bay fishing for bass my last 6 or so outings.

Re: Water clarity and eelgrass

Posted: Sat Mar 21, 2026 10:34 am
by kastmaster
I have noticed a lot more turbidity, less eelgrass, and a huge drop in spotted bay bass action at Coronado Cays. The invasive Caulerpa seaweed is also a factor in decimating eelgrass

Re: Water clarity and eelgrass

Posted: Sat Mar 21, 2026 5:00 pm
by risentidefishing
I’ve noticed similar issues with water clarity in the back bay, particularly off the Cays and up along the Silverstrand near Fiddlers. Bass bite has been in a little bit of a funk with all the hot weather