Flexible Farm Tanks

Egg laying species are usually divided into four basic groups: egg scatters, substrate spawners, bubble nest builders and mouth brooders. Fish species that live in rivers and streams are often egg scatters and they will typically let the current transport the eggs away and distribute them over a large area. The egg can also fall down to the bottom where the fry develop. Since egg scatters hardly ever encounter their offspring in the wild, they are likely to eat them in the aquarium since the enclosed space is an unnatural living environment. Substrate spawners will instead attach the eggs to some type of substrate to make it impossible for currents to carry them away. Some species will only use one specific type of substrate, and sometimes also vigorously clean it beforehand, while others are less selective. It is common for the male and/or the female to create a form of nest in the substrate. Bubblenest breeders will instead create a nest that is floating far away from the substrate. In most bubblenest building species it is the male that is responsible for building the nest and he will blow out tiny bubbles that he carefully glues together with saliva. Mouth brooders carry eggs and/or fry inside the mouth of a parent. Some species are maternal mouthbrooders while others are paternal mouthbrooders. Mouthbrooding will often be combined with substrate spawning.

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