ADFI	Average daily feed intake
ASV	Amplicon sequence variant
ATTD	Apparent total tract digestibility
BCS	Body condition score
BH–FDR	Benjamini–Hochberg false discovery rate
BW	Body weight
BWG	Body weight gain
CA	Crude ash
CF	Crude fiber
CON	Control group (diet containing 1% Ulva sp.)
CP	Crude protein
CPMG	Carr–Purcell–Meiboom–Gill
DADA2	Divisive Amplicon Denoising Algorithm 2
DM	Dry matter
EE	Ether extract
GE	Gross energy
GT	Gloiopeltis tenax supplementation group
HPLC	High-performance liquid chromatography
ME	Metabolizable energy
MetaCyc	Metabolic pathway database for microbial metabolism
NFE	Nitrogen-free extract
NMR	Nuclear magnetic resonance
OPLS-DA	Orthogonal partial least squares discriminant analysis
PBS	Phosphate-buffered saline
PCA	Principal component analysis
PCoA	Principal coordinates analysis
PERMANOVA	Permutational multivariate analysis of variance
PICRUSt2	Phylogenetic Investigation of Communities by Reconstruction of Unobserved States 2
QIIME2	Quantitative Insights Into Microbial Ecology 2
RA	Relative abundance
SCFA	Short-chain fatty acid
TSP	Trimethylsilyl propionate
VIP	Variable importance in projection