Marine fish come from the ocean proper, generally tropical reefs. The immense size of the ocean provides these fish with an extremely stable habitat. For this reason it is important to maintain the tank carefully, particularly pH and salinity, in order to thrive. Specialist equipment such as protein skimmers is also required. As a general rule they will need relatively larger tanks than freshwater species and are kept at much lower stocking densities. Feeding some species of marine fish can be hard as they do not readily take flake or crumble foods and prefer to feed on frozen or live foods. Choosing tank mates should be done carefully as some species are predatory. It should also be noted that some species such as Lionfish and Foxface can have poisonous spines that can deliver extremely painful stings, or even cause death to people under some circumstances.
The following are Care Sheets for a number of popular marine fish.
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