Tuesday, February 17, 2026

Endlers Fish Behavior

 

Endlers Fish Behavior

Blue star Endlers are one of my favorite aquarium fish.

Colorful and very energetic Endlers make any aquarium look gorgeous.


Endlers males are the first to start exploring the new aquarium.



Initially, they may hide, assessing the surrounding. 


Endlers females stay hidden for much longer while watching males.
In Endlers' society, males serve to distract predators from the Endlers female.
Brightly colored males attract everyone’s attention, including Endlers females’ attention.


The female moves out of hiding when she sees males are safe moving around.

Endlers males start flirting right away, trying to get her attention.

Males compete for her attention most of the time.

She is the queen, and she chooses which male to breed with and when.

Fast-moving and highly competitive Endlers males avoid physical contact most of the time.


It takes about a month for new babies to be born - here you can see one.
The newborn Endlers fry stays closer to the water surface and away from adult fish.
Adult Endlers, especially females, may eat sick, slow-moving babies.

Though healthy, fast-moving babies are safe to swim under cover of plants.

The same behavior can be observed in the larger-sized aquariums.


Endlers fry stay in groups away from adult fish.

Adult males scout around babies, but never actively chase after them.

Endlers self-regulate their density population in any size aquarium.


Endlers reproduce rapidly only under the right conditions.

Water quality, temperature, aquarium size, and availability of food determine how well Endlers breed.

The reproduction rate drops significantly in overpopulated aquariums of any size, regardless of the amount of available food.
Growing up to 3 cm long, Blue Star Endlers feed on plants and tiny live food as well.


Proficient breeding, small size, acceptance of various foods, and tolerance to various water conditions make Endlers most suitable for keeping them in sustaining self-feeding aquariums.


Endlers males may get aggressive toward each other if kept separately from females.
Check my previously published video about it.

Males follow the largest, most energetic female— the queen.

Endlers are very pretty and simple to keep in freshwater aquariums.

Have fun and happy aquariums :)

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