Do you mean, is there anything for saltwater that eats algae like plecos? Sadly, no. I used to have a 30 gallon freshwater tank with a pair of chinese algae eaters. Those two kept everything spotless, and they lived forever. In fact, I don't think I could have killed them even if I had tried. I wish they had a saltwater counterpart.
Originally Posted by iampumpkinman
ah, well, i was referring to fw too, so meh, and i thought there was a sw pleco, or at least one that could live in brackish?
No, no saltwater plecos. There is a brackish cat/shark, called a Columbian Shark. They are FW as babies, and can be slowly acclimated into salt (over a month of slowly raising it by .001 or 2. They do better in SW-Brackish as adults. They migrate in through the rivers to have babies.
I actually target catfish when fishing in April. I use them for bait for catching tarpon. We have 2 common species the Hardhead (Arius felis) and the Sail Cat (Bagre marinus). Their barbs pack a big punch.