Keepers are generally advised to avoid eels, tangs, triggerfish, squid, octopus, and sea anemones. Herbivores include fish such as parrotfish, the urchin "Diadema antillarum", surgeonfishes, tangs and unicornfishes. In addition to stamped tangs, many early knives had trademark etching on the blade. Blue Tangs are very common in Belize and especially Ambergris Caye. These tangs would be wedged into the grooves of the heft. Other species of tangs have also been successfully bred in captivity. Blue tangs cannot be bred in captivity and have to be caught in the wild. However, regal blue tangs are collected commercially for the aquarium trade. After the show has finished, Wesley is backstage with the Poon Tangs when Leanne arrives. Atlantic blue tangs engage in cleaning behaviors with other fish as both cleaners and clients. Schooling fish form compact groups with other blue tangs in addition to other species. Juvenile blue tangs eat continuously and feed heavily. Most tangs will not tolerate other fish the same color and/or shape as them. Tangs are very sensitive to disease in the home aquarium. Captive-bred yellow tangs are now routinely available for purchase at fish stores and online vendors.