![]() But, again, this behavior does not typically result in harm and usually resolves itself.Īnother interesting behavior of this tetra species is “fin flicking.” This action is in response to a threat and is more of a signal to others or protection against predators than aggression. Glowlights are seldom aggressive but can fin nip in response to environmental stressors or when establishing dominance. There is no harm in this behavior, but it can be interpreted as aggression. These fish are playful and tend to chase others. ![]() These community fish get along well with others however, some natural behaviors sometimes concern the novice aquarist. They swim predominantly in the middle to lower levels of the water column. Glowlight tetras are very active schooling fish that do best in groups of five or more. They are shy if kept as a single specimen and more confidently explore the tank in a group. With proper care, your glowlight can live anywhere from two to five years. However, most reach about 1.5 inches (4 cm). ![]() As an adult, they will stay less than two inches (5 cm) in length. At that point, she will appear rounded in the abdomen. Usually, the first indicator that your fish is a female is when she develops eggs. It is difficult to differentiate males from females, although the female can be slightly larger, and males sometimes have a brighter midline stripe. The line extends the entire length of the head and body, crossing the eye and terminating at the base of the tail.Ĭoloration can become more prominent as the fish ages. ![]() The unique appearance of the glowlight tetra, and the origin of its name, comes from its streamlined, semi-transparent body with a glowing orange or red midline. Most of the fish available on the market today are tank-raised, but they still favor an environment matching their natural habitat. These warm rivers are full of plant debris, and the tannins released during decay tint the water, making it soft and slightly acidic. It inhabits both clear and blackwater rivers in Guyana, particularly the Essequibo River. The glowlight ( Hemigrammus erythrozonus) is a freshwater tetra from South America. ![]()
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