Black Sea fauna

Natasha7622

Today, a 5-liter bottle arrived along with my relatives who were on vacation. The hermits Diogenes arrived and for some reason brought 3-4 rapanas, mussels, and this thing: I understand this is something like an anemone. Is it worth putting it in the aquarium?

Ronald5720

These are the eggs/roe of the same whelks. They don't belong in the tropics.

Jesse

Thank you! The units have flown away.

Emily

How much sand do you think is needed for a sand-dweller to live properly? Or maybe it’s not necessary to plant it at all? I don’t know... I will be starting with 40 liters.