When choosing Neolamprologus tretocephalus in a store, pay attention to the fish's activity and the condition of its skin. Healthy specimens should be active, curious, and free of visible damage, ulcers, white film, or frayed scales. Pay special attention to behavior: avoid buying fish that constantly hide in a corner, breathe heavily, or show signs of emaciation, as this species is extremely sensitive to water quality and transport stress. — Check for a sunken belly, which may indicate internal parasitic infections. — Make sure the fish's eyes are clear, without cloudiness, and the fins are spread out and not torn. — Ask the seller what the fish are fed, as adaptation to new feeding conditions can be difficult for this species with an incorrect diet.