simple-icons/icons/mermaid.svg

<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>Mermaid</title><path d="M23.99 2.115A12.223 12.223 0 0 0 12 10.149 12.223 12.223 0 0 0 .01 2.115a12.23 12.23 0 0 0 5.32 10.604 6.562 6.562 0 0 1 2.845 5.423v3.754h7.65v-3.754a6.561 6.561 0 0 1 2.844-5.423 12.223 12.223 0 0 0 5.32-10.604Z"/></svg>