I was wondering how other mers ensure their shells and shell made products are environmentally friendly?

After working with some charities, I was advised never to buy seashells or goods made of seashells in stores (particularly in beach resorts) as many are trawled from the seabed, resulting in the death of seahorses/corals and so forth. It upset me so greatly that I have only ever bought or made synthetic seashell bras/headdresses etc. My recent open-sea mermaiding in Croatia revealed the extent of the ruined seabed in so many areas to me.

Is this something others do as well? I'm assuming the mercommunity is aware of this, as we all hope to improve the condition of our oceans. What ways can I ensure I am not contributing to destruction of sealife?