Carol,
I would be most interested in knowing whether you are finding the longsnout seahorses on the
west or east sites of the Blue Heron Bridge park area (Phil Foster Park).
It really is a great "muck diving" opportunity between trips to the Indo-Pacific!
Thank you.
Bob
Bob,
I actually spent a number of days in a short time-span diving there, late May/early June. I hadn't dove there for over a year and my gal buddies that I usually dive with were tied up.
Creatures really do move around a lot there, that coupled with an amount of unethical "collecting" in spots and the fact that the bottom changes too because abandoned/wrecked boats & debris are regularly pulled out (and the fish's habitat disrupted) --- means that the a lot of the sealife is is in different spots every time I dive it.
This time I just had to scout it out on my own and with a buddy who never dives there and I have to say it was a blast discovering things for myself! I actually like diving the Bridge that way better (than having someone show me where things currently are).
Of course I could have gleaned info from pals but again I enjoyed the "treasure hunt".
But if you really want to know where things are then hire "Laz" - he is a member here and a divemaster who dives the Bridge a lot more than I do.
But do keep in mind that most divers who dive a lot there will not tell you where things are located -- is is sort of a "right of passage" to find things on your own....
. Also is for several other reasons, to curb fish collecting, so some rare creatures have some measure of privacy and I think the foremost reason because things change locations there so much! Especially seahorses as they like a certain water salinity and abundant food sources so they are always moving around at Blue Heron Bridge.
So hire "Laz", or just go on your own and scout the whole area out. It is a much more "proud feeling of accomplishment" for myself when I find things on my own anyway - and many times I find things that others never see that way.... 
Also to add I do believe that more divers being interested in the creatures of Blue Heron Bridge is in itself helping to protect them. The Park Rangers, Fish and Wildlife and most of all other divers around are helping more than ever to curb the shady fish collecting (and if the creatures collected there are then sold it is illegal and the authorities are taking action). Of course the best solution would be to get the area protected, but in lieu of that a lot of divers being excited about and watching out for the rare marine life will help.
Good Luck!!! Best Regards, Carol
PS - Yes I agree that it is a good "muck diving" spot, but not just as a substitute trip between trips to the Indo-Pacific, because you find cool things at BHB that you'd never find in the Pacific! B)