On Plants:
* Many species, especially livebearers like guppies, swordtails, and mollies, give birth to live young. However, some species like Platy's will attach their eggs to plants.
On Rocks or Decorations:
* Cichlids often attach their eggs to rocks, caves, or other decorations.
* Some catfish species also lay their eggs on rocks or wood.
In Caves or Hiding Spots:
* Many cave-dwelling fish, like some tetras, will lay their eggs in caves, crevices, or under driftwood.
On the Substrate:
* Some species, like Corydoras catfish, lay their eggs directly on the bottom of the tank.
Bubble Nests:
* Male Bettas are famous for creating bubble nests at the surface of the water. They then coax their female to lay eggs in the nest, and he cares for the eggs and fry.
In Spawning Boxes:
* Fish breeders sometimes use spawning boxes to isolate the breeding pair and ensure the eggs are safe and undisturbed.
It's important to note that each species has its own specific requirements and preferences for egg-laying. If you're interested in breeding a specific species, research its individual needs.