Freshwater angelfish and clownfish are not compatible but saltwater angelfish and clownfish are compatible. Angelfish are cichlids, so they are somewhat aggressive, but mostly when it comes to claiming a part of tank as their own region and of course, when it comes to spawning.
If we’re talking freshwater angelfish, they range from relatively meek and passive (especially at small size), to semi aggressive and aggressive at large size and when forming mated pairs (*they are quite excellent parents that will rather aggressively drive off anything that attempts to come near the eggs). In this case, no you cannot mix freshwater angels with clownfish (*they’re saltwater!)
If we’re talking saltwater angelfish, it will depend. Saltwater angelfish are often divided by hobbyists in two general groups. Pygmies and large angels. Pygmy angelfish belong to the genus Centropyge. They are relatively small growing angels when compared to other genus, generally staying under 4-4.5 inches, species dependent. Centropyge angels often mix well with clowns and have more reef-compatibility related issues (*they are often considered a fish to exercise caution when adding to a tank with sessile inverts as they will often nip at polyps and clam mantles). If you are talking larger angels, these can be a bit more snippy to aggressive and may need to be mixed cautiously, taking things on a case by case basis.
As per the clowns, just take care with the larger, more boisterous clowns such as the maroon, clarkii, tomato, fire, cinnamon, etc. These guys can get a bit pushy when it comes to their territory, and many owners of large females often complain that they can be downright aggressive (especially large females of the maroon or clarkii). These species may fair better with the larger angels but be utter monsters to Centropyge species.
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Freshwater angelfish and clownfish are not compatible but saltwater angelfish and clownfish are compatible. Angelfish are cichlids, so they are somewhat aggressive, but mostly when it comes to claiming a part of tank as their own region and of course, when it comes to spawning.
If we’re talking freshwater angelfish, they range from relatively meek and passive (especially at small size), to semi aggressive and aggressive at large size and when forming mated pairs (*they are quite excellent parents that will rather aggressively drive off anything that attempts to come near the eggs). In this case, no you cannot mix freshwater angels with clownfish (*they’re saltwater!)
If we’re talking saltwater angelfish, it will depend. Saltwater angelfish are often divided by hobbyists in two general groups. Pygmies and large angels. Pygmy angelfish belong to the genus Centropyge. They are relatively small growing angels when compared to other genus, generally staying under 4-4.5 inches, species dependent. Centropyge angels often mix well with clowns and have more reef-compatibility related issues (*they are often considered a fish to exercise caution when adding to a tank with sessile inverts as they will often nip at polyps and clam mantles). If you are talking larger angels, these can be a bit more snippy to aggressive and may need to be mixed cautiously, taking things on a case by case basis.
As per the clowns, just take care with the larger, more boisterous clowns such as the maroon, clarkii, tomato, fire, cinnamon, etc. These guys can get a bit pushy when it comes to their territory, and many owners of large females often complain that they can be downright aggressive (especially large females of the maroon or clarkii). These species may fair better with the larger angels but be utter monsters to Centropyge species.