You can try the following types of marine fish:
Puffers (Arothron hispidus)
Batfishes (Platax spp.)
Snappers (Lutjanus spp.)
Damselfishes (family Pomacentridae)
Catfishes (Plotosus spp.)
Seahorses (family Syngnathidae)
Read the following link for more specific info:
http://users.macunlimited.net/n.monk...kfaq.html#BM1e
I found it very informative when I set up my brackish system.
Personally, I only have experience converting brackish fish into marine. I always wanted a humbug so I might try this myself...