apparently zoo can be toxic Beautiful Corals in Home Aquariums Can Poison You
Aquarium enthusiasts and people who work in aquarium stores should be aware that some types of coral produce dangerous toxins that can be hazardous to your health, according to a new report.

The report, from the Centers for Disease Control and Prevention, describes 10 cases of toxin poisoning in Alaska between 2012 and 2014 that were linked to zoanthid corals, a common type of coral in home aquariums. Some zoanthid contain high levels of palytoxin, a toxin that can cause life-threatening symptoms if people touch, inhale or ingest it, the CDC said

so thus please read on