Edited by MattMudCrab, 16 August 2020 - 06:31 PM.
High end salinity brackish species?
Posted 16 August 2020 - 06:29 PM
Posted 16 August 2020 - 07:26 PM
Hey Matt, welcome to NANFA! I've collected all of the species mentioned from 1.009-1.019 SG. Thanks for visiting my YT channel. I am pretty sure they can all live in full saltwater. In addition to the species that you've mentioned, I've collected rainwater killifish, mummichogs, four-spined sticklebacks. Striped killifish prefer saltier water but can be found from 1.015 SG up to full saltwater. There probably are other killies too. If you want to raise the salinity to near salt water, all of those species can survive in it. There are a couple more goby species in the Chesapeake but I haven't collected them yet. You can also find some tropical strays that venture into lower salinity waters (on the high range of brackish) such as the spotted burrfish, porcupinefish, and the spotfin butterflyfish. There is another blenny common to the Bay that can be found in a large salinity range, the feather blenny (Hypsoblennius hentz), although I have yet to collect one of those recently. I caught one years ago near Solomon's Island.
There are also a couple pipefish species that you can collect, but they need live food. You can also collect seahorses. But neither of these would do well IMHO with the more aggessive species listed above.
If you do a search on the net for "Chesapeake Bay Species List 2007" you will find a PDF that I've found useful.
As far as dither fish, the rainwater killies seem to fit that niche in my current tank.
Posted 16 August 2020 - 08:26 PM
Posted 18 August 2020 - 10:29 AM
I have kept several killifish in brackish to marine water. I kept my brackish setup with a specific gravity of 1.012 - 1,014 out of ignorance. With my never having lived near an ocean and finding nothing on brackish salinity in books at the time, I assumed that brackish must be halfway between freshwater and marine, so that's why I picked that SG. I have kept gulf killifish and sheepshead minnows at that salinity for years. I kept longnose killifish and diamond killifish at that salinity for a few weeks while my marine water pH cycled. All were caught in brackish water, and most in shore areas of the Gulf of Mexico where the SG read 1.001 - 1.004. I was shocked at how fresh it was; I assume there is movement of the fish to higher salinity areas of the Gulf during the day.
Gulf killifish are commonly sold as live bait fish. Mummichogs are as well and should easily handle that SG. I've seen longnose killifish in bait tanks also in coastal areas, usually as by catch, but bait dealers will commonly catch or let you catch their oddballs.
My understanding is that golden topminnows are found in brackish water, but I have never caught them in any but freshwater. I doubt that blackstripe topminnows tolerate brackish water. Aquabid sometimes has saltwater and brackish killies for sale.
Posted 19 August 2020 - 09:29 AM
Mummichogs get pretty beefy, but are pretty docile to everything except each other, and even then, they really don't do much damage. Actually, striped blennies, even small ones, will dart out of their shells and attack mummichogs and sheepshead minnows, causing some tail damage on even the largest of mummichogs. But, mummichogs are so durable that they can pretty much withstand anything. I think that if there ever was a nuclear holocaust, mummichogs will survive right alongside cockroaches, they are that tough.
I actually never had much of a problem with mummichogs in my tank, but I've witnessed that specific striped blenny behavior in other tanks.
With mummichogs, and probably all coastal killies, make sure you QT and treat them for diseases prior to adding them to your display tank. I personally would do that even if I bought them from a vendor. They seem to be ich magnets. They are so tough that they seem to be able to withstand the infection, but they spread the diseases to other fish. I treat mine with copper, and at least 2 weeks at the therapeutic level, and follow that with 2 days of Prazipro treatment. So far, that seems to have been a good working formula for me.
Posted 19 August 2020 - 01:54 PM
Posted 19 August 2020 - 02:00 PM
The grass shrimp these places are selling a salt water feeders to replenish my shrimp when they die. I mean I currently have one large tank with a flower horn by himself, another tank with a severum and a few hidden catfish. So display tanks with one main fish is ok by me. For that matter I could go out to my water garden in the yard and convert some of my mosquito fish over if I wanted some more movement up top.
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