This is a general hint!
Nemertesia antennina 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 Nemertesia antennina in their aquarium to get a better picture about the possible danger. However, please be careful when using Nemertesia antennina. 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
Sea beard, Nemertesia antennina,
Nemertesia antennina is found attached to shells and stones on sandy bottoms from the shallow sublittoral into deeper waters offshore.