Sailfin blennies, Emblemaria pandionis, are small, black or grey blennies that are great for reef tanks because they don’t get big (maximum size of less than 3″, they don’t pick at corals, and they get along with most other fish.
The males are generally jet black and have a huge dorsal fin that looks like a sail when they stick it up, which they do frequently. Females are generally a lighter color than the males, and do not have as large of a dorsal fin, but they are neat too.
They are not picky eaters and will eat anything from frozen foods to pellet foods, so just feed them what you feed the rest of the critters in your tank and they will be happy.
This is the only picture I have for now, and it doesn’t show the high sail fin dorsal, so you’ll just have to imagine what it looks like.
Please Note: Any new fish purchased from us or from a local pet store should to be quarantined. All fish from anywhere in the wild can be possible carriers of bacteria and protozoa that can lead to an infection in your system, so we always recommend that you use some sort of quarantine system prior to adding them to your system. If you have a fish only system and can medicate the whole system, you may not need a separate quarantine tank. If you have a reef system that cannot be medicated, a good ultraviolet sterilization system should prevent any kind of disease outbreak. We medicate our system for bacterial infections and protozoans, but because we dont always hold our fish for long periods of time, there is no way to be sure all the protozoan cysts have been killed. A little bit of prevention will save you lots of trouble down the line.