Table 2. Alpha-diversities obtained for 18S rDNA and COI gene metabarcodes in the ports studied in this work.

	Taxa S		Shannon		Margalef
	COI	18S	COI	18S	COI	18S
Eo	35	7	3.555	1.946	9.563	3.083
Luarca	19	6	2.944	1.792	6.113	2.791
Cudillero	24	-	3.178	-	7.237	-
Aviles	18	20	2.890	2.996	5.882	6.342
Gijon	38	20	3.638	1.634	10.17	2.337
Villaviciosa	22	-	3.091	-	6.794	-
Ribadesella	39	8	3.157	1.386	8.189	1.924
Llanes	16	48	2.773	3.871	5.41	12.14