How to Tell Male and Female Zebrafish Apart? A Quick Guide to Identifying Males and Females

Male zebrafish have a slender body, relatively large fins, a brownish-yellow anal fin, and fairly prominent stripes. Females have a plumper body, paler coloration, a pale yellow anal fin, and an obviously swollen belly during the egg-bearing period.

1. What Are Zebrafish

Zebrafish measure 4-6 cm in body length and have a spindle-shaped body, an olive-colored back, and several longitudinal stripes running along the sides of the body from behind the gill cover all the way to the tail, with similar longitudinal stripes on the anal fin. The caudal fin is long and forked. They swim quickly and prefer clear, mild water quality. Their maximum lifespan is 2-3 years, during which they also grow, reaching roughly 6 cm or so.

2. What Do Zebrafish Eat

What zebrafish eat falls mainly into two stages: the fry stage and the adult stage. The period for a while after zebrafish first hatch is called the fry stage. At this stage, zebrafish feed mainly on brine shrimp and paramecia; both foods are good for getting young fry to start feeding, but both need to be hatched yourself. The process is simple, and hatching is complete in about 36 hours. If you do not want to hatch them yourself, another option is to feed boiled egg yolk water or cooked egg yolk crumbs. It is not advisable to feed too much of this food, as it easily fouls the water quality; you need to judge the specific amount yourself.

Zebrafish are very lively and active. Keeping zebrafish can bring vitality and energy indoors, and they are omnivorous fish that are very easy to feed.