Epithelial Cells/metabolism; Gene Expression Regulation; Gills/cytology; Glucose Transport Proteins, Facilitative/metabolism; Zebrafish Proteins/metabolism; Zebrafish/metabolism; Acclimatization/genetics; Amino Acid Sequence; Animal Structures/metabolism; Animals; Calcium/pharmacology; Chlorides/pharmacology; Cloning, Molecular; DNA, Complementary/genetics; Forkhead Transcription Factors/genetics; Gene Expression/drug effects; Gene Expression/genetics; Gene Expression Regulation, Developmental/physiology; Gene Order/genetics; Gills/metabolism; Glucose Transport Proteins, Facilitative/chemistry; Glucose Transport Proteins, Facilitative/genetics; Larva/metabolism; Membrane Proteins/chemistry; Molecular Sequence Data; Oligonucleotides, Antisense/genetics; Phylogeny; Protein Isoforms/genetics; Protein Structure, Tertiary/genetics; Sequence Homology, Amino Acid; Skin/metabolism; Sodium/pharmacology; Zebrafish/genetics; Zebrafish Proteins/chemistry; Zebrafish Proteins/genetics