The Lamark Angel is relatively hardy for an Angel Fish, making it a good first angel for an experienced aquarist. These fish are both unique and interesting, and can make rewarding captives.

In the wild, Lamark Angels are usually found in groups of similar fish, which is rather unusual for angelfish. These groups usually remain in shallower waters, around ten meters in depth, feeding on plankton. In captivity, the lovely Lamark Angel fish may be rather retiring in nature, so hiding places should be provided. Many owners report that Lamark Angels emerge into open areas of their aquariums only when food is offered. These fish are considered to be quite hardy and easy to care for, relative to other angels. They may tolerate other angels, and, when combined in an aquarium, a male and female often pair up after a period of time. This may occur even if they are collected separately. They are not normally considerd reef safe but many people have successfully kep them in miniature reef aquariums.

The Lamark Angel may reach up to nine inches (23 centimeters) at maturity. It is a beautiful silver-blue color, with dark gray to black lines running horizontally over its body. Normally a thick bar extends from the eye to the tip of the caudal fin, with other, thinner stripes above and below. A series of dark dots may also be present over the caudal and anal fins. Some of these dots extend over the upper back toward the dorsal fin. The dorsal fin of the Lamark Angel is outlined by a dark edge.

The natural range of the Lamark Angel includes the New Hebrides and Solomon Islands, through Indonesia, north to Japan. However, Lamark Angels are somewhat rare in the wild. Interestingly, Lamark Angels show such marked sexual dimorphism that males and females have been mistaken for being fish of different species.

A single Lamark Angel should have an aquarium of at least 80 gallons. The temperature should remain 72 to 78 degrees Fahrenheit (23 to 26 degrees Celsius), with a pH between 8.3 and 8.4. The Lamark Angel should be kept at a specific gravity between 1.020 and 1.025. The lower end of this range would be appropriate for a fish-only enclosure, though in aquariums including invertebrates, 1.023 to 1.025 would be most appropriate in order to keep the invertebrates healthy. Plenty of hiding places should be provided. The most important part of a Lamark Angel's diet is variety. Algae, spinach, sponges, mussels, squid, shrimp, and spirulina are commonly offered.

Male Lamark Angels have more pointed caudal fins than females. They also have a yellow marking on the forehead that female Lamark Angels lack. When two Lamark Angels are combined in an aquarium, they may pair up, and in a two-male situation, one of the fish may eventually become female. There is no further information available concerning the captive breeding of Lamark Angels.