Sánchez Hernández LECHU le 15/05/24
Ofiura a determinar, disco muy pequeño en comparación con sus brazos
Sánchez Hernández LECHU le 18/05/24
Ok, muchas gracias
Frédéric DUCARME le 17/05/24
It looks like the central disk was eaten out, hence the "bleached" center... Because according to the arms this is the dorsal side and we should not be ablt to see the jaws. I don't know whether they can survive this.
Then it could have been an Amphiura such as A. chiajei or filiformis.