There are at least 20 to 30 species that belong to the jawfish group of family. Among them, the most popular is the "Yellow Head" or sometimes called "Pearly" jawfish. It can be easily identified based on its light creamy blue body color with only the head appearing pale yellowish. The other notable species belonging to the same group that are worth mentioning here are the "Blue Spotted" and "Dusky" jawfish. But however, unlike the pearly yellow head, the other two are not considered among the favorites because their dark brownish color appearance do not seem to attract attention of hobbyist. Nevertheless, all the fish that belong to this Opistognathidae family have one thing in common is that their behaviors are all the same while appearance wise in terms of body structure, it can be seen that the rear dorsal fin actually extends all the way from head to tail. Some aquarist have actually mistaken them to be dottybacks with some resemblance in terms of body size but both fishes are actually not really related to each other.
Favorite foods to feed your pets should be shrimps and small feeder crabs. If you can’t afford to provide natural live foods all the time, I would suggest using high quality marine pellets and providing occasional feed of special meal whenever available. There are even zooplankton mixtures which are sold in some aquarium pet stores but nowadays I've rarely seen it. Your jawfish will definitely enjoy those as they will dash out from their hiding spot and quickly grab the food. If for any reason that you find your fish are not going about with their daily activities and rejecting the food offer, this should trigger an alarm to immediately check for deteriorating water quality and signs of disease.
Commercial farm bred jawfish are often sold online and in pet stores with the price can easily fetch between $20 to $30 depending on the specimen age and maturity. Some suppliers will offer them as a pair but be careful of this deal because between the male and female jawfish, there is no way to find out the difference due to their similar body structure. As mentioned earlier, keeping them with other peaceful community fish should not pose any problem and it makes perfect sense not to mix them with other predatory species like the lionfish. They will be just fine with presence of clown fish, royal gramma, bannerfish and other reef safe sea basses. However, if you have a small display show tank under 50 gallon, try not to purchase more than two of the same fish types because that would leave the jawfish becoming territorial as they try to establish their own area. Other worthy marine pets for your fish tank: Seahorses