Table 5. Mean relative abundance (%) ± SD (n = 6) of the most prevalent phyla, orders, classes, families, and genera found in faecal samples of sea bass fed with four experimental diets.

TAXA	DIET
	CTRL			GMOS			GMOSPHYTO			PHYTO
Phylum
Actinobacteria	1.84	±	1.29	5.46	±	7.41	0.13	±	0.19	0.38	±	0.66
Bacteriodetes	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	1.85	±	1.14
Firmicutes	4.82	±	4.94	4.32	±	5.46	1.27	±	2.01	3.35	±	3.08
Proteobacteria	92.84	±	6.45	88.63	±	4.90	92.12	±	5.26	92.7	±	5.63
Spirochaetes	0.03	±	0.08	0.00	±	0.00	1.71	±	1.63	0.75	±	1.67
Tenericutes	0.04	±	0.08	0.67	±	1.65	4.75	±	7.10	0.77	±	1.32
Class Actinobacteria	1.84	±	1.29	5.45	±	7.40	0.00	±	0.00	0.37	±	0.66
Bacteroidia	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	1.85	±	1.13
Bacilli	4.73	±	4.89	4.27	±	5.46	1.17	±	2.02	0.35	±	0.61
Clostridia	0.08	±	0.05ab	0.04	±	0.09b	0.10	±	0.15ab	2.97	±	2.57a
Alphaproteobacteria	30.71	±	32.38ab	35.51	±	25.31a	3.85	±	3.29b	6.45	±	12.44b
Betaproteobacteria	2.73	±	2.35a	8.40	±	10.60a	0.12	±	0.13b	0.21	±	0.46b
Gammaproteobacteria	59.34	±	34.08ab	47.70	±	31.35b	88.14	±	5.51a	86.04	±	17.08a
[Brevinematae]	0.00	±	0.00	0.00	±	0.00	1.70	±	1.62	0.74	±	1.67
Mollicutes	0.03	±	0.08	0.67	±	1.64	4.74	±	7.09	0.77	±	1.32
Order
Actinomycetales1.84±1.29a5.45±7.40ab0.12±0.18b0.05±0.07bBacteroidales	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	1.85	±	1.13
Bacillales	1.44	±	1.28	0.27	±	0.55	0.04	±	0.07	0.06	±	0.11
Lactobacillales	3.28	±	3.83	4.00	±	5.57	1.13	±	2.03	0.29	±	0.50
Clostridiales	0.08	±	0.05ab	0.04	±	0.09b	0.09	±	0.15ab	2.98	±	2.57a
Rhizobiales	0.86	±	0.49a	2.82	±	6.38ab	0.04	±	0.03b	0.06	±	0.13b
Rickettsiales	29.40	±	31.34ab	29.62	±	22.08a	3.80	±	3.26b	6.39	±	12.31b
Burkholderiales	0.91	±	0.63a	5.97	±	10.27ab	0.03	±	0.02b	0.11	±	0.23b
Neisseriales	1.82	±	1.78a	2.43	±	3.69ab	0.01	±	0.11b	0.10	±	0.23b
Alteromonadales	5.53	±	11.95	2.15	±	3.99	0.00	±	0.00	0.02	±	0.04
Enterobacteriales	7.36	±	15.87a	4.06	±	3.80ab	0.00	±	0.00	0.03	±	0.04b
Oceanospirillales	0.00	±	0.00	3.11	±	4.86	0.00	±	0.00	0.00	±	0.00
Pasteurellales	0.00	±	0.00	1.74	±	4.27	0.00	±	0.00	0.00	±	0.00
Pseudomonadales	2.07	±	2.16a	3.60	±	3.82ab	0.11	±	0.17b	0.09	±	0.13b
Vibrionales	44.36	±	39.70bc	30.89	±	34.12c	88.02	±	5.53b	85.90	±	17.30a
[Brevimatales]	0.03	±	0.07	0.00	±	0.00	1.71	±	1.62	0.75	±	1.67
Mycoplasmatales	0.03	±	0.08	0.67	±	1.64	4.74	±	7.09	0.77	±	1.32
Family
Corynebacteriaceae	1.37	±	1.26	1.09	±	2.48	0.09	±	0.14	0.00	±	0.00
Propionibacteriaceae1.98±2.87a8.40±12.08ab0.04±0.05b0.05±0.10bBacteroidaceae	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	1.48	±	1.09
Bacillaceae	0.52	±	0.49	0.00	±	0.00	0.00	±	0.00	0.02	±	0.05
Staphylococcaceae	2.57	±	4.40	0.68	±	1.53	0.04	±	0.07	0.06	±	0.10
Lactobacillaceae	5.00	±	5.96	4.78	±	6.41	1.14	±	2.22	0.33	±	0.63
Streptococcaceae	0.67	±	0.51a	0.39	±	0.89b	0.04	±	0.06b	0.05	±	0.08b
Lachnospiraceae	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	1.43	±	1.18
Ruminococcaceae	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	1.95	±	2.68
Aurantimonadaceae	0.00	±	0.00	2.28	±	5.58	0.00	±	0.00	0.00	±	0.00
Methylobacteriaceae	1.99	±	2.95a	2.91	±	6.04ab	0.04	±	0.04b	0.08	±	0.16b
Rhodobacteraceae	1.43	±	2.93	0.05	±	0.14	0.00	±	0.00	0.00	±	0.00
Comamonadaceae	0.95	±	1.31a	5.36	±	8.01ab	0.02	±	0.02b	0.07	±	0.14b
Oxalobacteraceae	1.50	±	2.31a	4.38	±	9.78ab	0.00	±	0.00	0.08	±	0.19b
Neisseriaceae	5.43	±	9.21a	3.49	±	4.35ab	0.10	±	0.11b	0.14	±	0.32b
Shewanellaceae	6.26	±	12.35	1.34	±	3.27	0.00	±	0.00	0.02	±	0.06
Enterobacteriaceae	8.29	±	16.41a	7.23	±	6.64a	0.00	±	0.00	0.04	±	0.06b
Halomonadaceae	0.00	±	0.00	3.63	±	5.66	0.00	±	0.00	0.00	±	0.00
Pasteurellaceae	0.00	±	0.00	3.17	±	7.77	0.00	±	0.00	0.00	±	0.00
Moraxellaceae	2.85	±	2.35a	6.28	±	7.17ab	0.05	±	0.07b	0.11	±	0.19b
Vibrionaceae	13.08	±	17.00b	34.00	±	37.07b	25.55	±	29.10b	86.56	±	8.71a
Brevinemataceae	0.03	±	0.08	0.00	±	0.00	1.81	±	1.75	0.75	±	1.67
Mycoplasmataceae	0.04	±	0.09	0.71	±	1.74	4.82	±	7.16	1.02	±	1.87
Genus
Corynebacterium	1.37	±	1.26	1.08	±	2.48	0.09	±	0.14	0.00	±	0.00
Propionibacterium	1.98	±	2.87a	8.40	±	12.08ab	0.04	±	0.05b	0.05	±	0.10b
Bacteroides0.00±0.000.00±0.000.00±0.001.48±1.09Staphylococcus	2.57	±	4.40	0.68	±	1.53	0.04	±	0.07	0.06	±	0.10
Lactobacillus	5.00	±	5.96	4.48	±	6.41	1.14	±	2.22	0.33	±	0.62
Streptococcus	0.67	±	0.51a	0.39	±	0.89ab	0.04	±	0.06b	0.05	±	0.08b
Faecalibacterium	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	1.10	±	1.17
Ruminococcus	0.00	±	0.00	0.00	±	0.00	0.00	±	0.00	0.69	±	1.30
Methylobacterium	1.99	±	2.95a	2.91	±	6.04ab	0.04	±	0.04b	0.08	±	0.17b
Paracoccus	1.21	±	2.58	0.06	±	0.14	0.00	±	0.00	0.00	±	0.00
Aquabacterium	0.86	±	1.37	5.36	±	8.00	0.02	±	0.02	0.07	±	0.14
Janthinobacterium	1.37	±	2.20a	0.22	±	0.53b	0.00	±	0.00	0.08	±	0.19b
Glaciecola	0.00	±	0.00	1.88	±	4.61	0.00	±	0.00	0.00	±	0.00
Shewanella	6.26	±	12.35	1.34	±	3.27	0.00	±	0.00	0.02	±	0.05
Escherichia	8.28	±	16.39a	7.23	±	6.63a	0.00	±	0.00	0.03	±	0.06b
Cobetia	0.00	±	0.00	3.63	±	5.66	0.00	±	0.00	0.00	±	0.00
Aggregatibacter	0.00	±	0.00	3.17	±	7.77	0.00	±	0.00	0.00	±	0.00
Acinetobacter	0.95	±	1.79	0.11	±	0.28	0.00	±	0.00	0.01	±	0.02
Enhydrobacter	1.90	±	1.73	4.81	±	7.30	0.05	±	0.07	0.07	±	0.16
Psychrobacter	0.00	±	0.00	1.35	±	3.30	0.00	±	0.00	0.02	±	0.03
Enterovibrio	0.00	±	0.00	0.01	±	0.02	0.02	±	0.50	3.72	±	8.32
Photobacterium	0.65	±	0.96	17.75	±	25.22	0.22	±	0.50	18.69	±	36.78
Vibrio	7.82	±	10.62	0.74	±	1.81	12.92	±	11.90	30.00	±	42.93
Mycoplasma	0.04	±	0.08	0.71	±	1.74	4.81	±	7.16	1.02	±	1.87

Means in the same row with different letters indicate statistical significance between taxonomic groups’ abundances (p<0.05)