This is a general hint!
Calamus penna has a harmful toxin.
As a rule, animals with a harmful poison do not pose any danger in normal Aquarieaner everyday life. Read the following husbandry information and comments from aquarists who already keep Calamus penna in their aquarium to get a better picture about the possible danger. However, please be careful when using Calamus penna. Every human reacts differently to poisons.
If you suspect that you have come into contact with the poison, please contact your doctor or the poison emergency call.
The phone number of the poison emergency call can be found here:
Overview Worldwide: eapcct.org
Translated with www.DeepL.com/Translator
Western Atlantic: Florida, USA and the northeastern Gulf of Mexico to Rio de Janeiro, Brazil; throughout the West Indies.
Found in clear reef areas over soft or semi-hard bottoms. Juveniles are encountered in seagrass (Thalassia) beds.
Marketed fresh and frozen, reports of ciguatera poisoning.