Aggressive tropical fish for aquarium

Damsel Fish Information: Care, Tankmates, Types and Breeding

They also eat the zooplankton found in the natural ecosystem, so they should not be kept in an aquarium with aggressive mechanical filtration which may kill these plankton. They will usually accept flakes but, for best results, should be supplied with a variety of foods including freeze dried and live food.

Sometimes damsel fish develop a symbiotic relationship with an anemone or other cnidarian like that for which clown fish are famous. Due to their general fondness for similar hiding places in niches on the reef, and their tendency to be fiercely territorial about them, they should not be kept with clown fish or butterfly fish.

They are less aggressive in general if they have plenty of space and plenty of cover to make them feel secure. Though they may bully smaller fish, they're often okay with dissimilar-looking species of their own size, but they seem to be particularly tasty so should not be kept with any fish large enough to eat them.

Types of Damsel Fish

There are numerous species of damsel fish in the wild, but only a limited number have proven capable of adapting to aquarium conditions.
  • Yellowtail Damsel Fish -The most popular damsel fish available, these naturally resilient fish are comparatively peaceful if kept in a shoal in a tank where they feel secure.
  • Three Stripe Damsel Fish -These striking black and white fish are fairly aggressive and need a large aquarium with plenty of hiding places.
  • Cerulean Damsel Fish -These vividly coloured fish are very territorial and should be added to the aquarium only after more peaceful fish have had time to establish themselves.
  • Sulphur Damsel Fish - With exotic yellow colouration, these hardy and adaptable fish are aquarium favourites.
  • Blue Green Chromis -These stunningly beautiful iridescent fish are naturally hardy and peaceful by nature. Despite being small they need a lot of swimming space.
  • Garibaldi Damsel Fish -These handsome orange fish are very aggressive towards their own kind but can live fairly peacefully with other species. They are comparatively large and long-lived.

Breeding Damsel Fish

Getting a pair of damsel fish is easy, as they will change sex so that one is male and one is female. The male will seek out a flat horizontal surface and clean it for use as a nesting site, before engaging in a complex courtship dance involving colour changes and sometimes the production of loud clicking sounds. Sometimes a male will court several females at once and collect all their eggs in his nest, which he will then defend vigorously.

He will also fan them with his fins to keep them cool, often neglecting to eat in the process. However, after the fry hatch he may pay them little attention, so it's a good idea to remove them if you have a busy tank and want them to survive. They are very small to begin with, but can usually be fed successfully on plankton.


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