Males are often slimmer but larger-bodied than females and are more vibrantly colored. The dorsal and anal fins of the male are more pointed, larger and more flowing than in the female. In many species, the male will display egg-shaped markings on the anal fin known as egg spots.

Generally speaking, the female danios have rounder and deeper body shapes compared to the males regardless of whether they are carrying roe or not. Males usually have slender as well as smaller bodies compared to females. The male zebra danio has a torpedo-shaped body while the females tend to have a bigger belly.

Danios and guppies are good together because they have a lot of things in common. They are both tropical fish, and they don’t have any outrageous environmental demand. The combination of these two species in the same tank is very colorful, making them fun and relaxing to watch.

A zebra danio is ready to lay eggs when you see her midsection bulging with lots of little circular protrusions. They will get very large and chunky. When the male starts chasing the female a lot, it also usually signifies that the female is ready to lay eggs.

Zebra danios sometimes behave fiercely when they’re not in the company of many other fish. In an underpopulated tank, they’ll often nip or chase after fish of lower ranking. The presence of too many fish is also a problem for zebra danios, as it can cause them to feel extremely frustrated and anxious.

Yes, besides eating their own eggs, Danios can eat their babies as well. Therefore, you should remove separate the parent fish from its offspring after spawning.

In captivity, zebrafish can live over 5 years, however generally they live for 2 to 3 years, and grow up to about 65 mm long.

Zebra Danios are of no economic importance in commercial fisheries as a food fish, but very commonly known and popular in the aquarium trade.

Among aquarium fish, livebearers are nearly all members of the family Poeciliidae and include guppies, mollies, platies and swordtails. The advantages of livebearing to the aquarist are that the newborn juvenile fish are larger than newly-hatched fry, have a lower chance of mortality and are easier to care for.

After their mother helps them out of the egg sac, these spiderlings climb up her legs and piggy-back around with her. A first layer of spiderlings will cling to special knobbed hairs on her abdomen, with upper layers of spiderlings hanging on to their siblings below.

Spiders die soon after giving birth to hundreds of eggs because it takes too much strength from them, is too exhaustive a task and spiders mostly are malnourished while going through of giving birth. Birthing in spiders is a task that means making egg sacs along with laying eggs within them.