The following publications, though earlier literature, on fish swimming might of interest:
Kutty, M. N.1968. Respiratory quotients in goldfish and rainbow trout. Fish. Res. Bd. Can., 25(8): 1689-1728.
KUTTY, M. N., G. MURUGABOOPATHY AND T. S. KRISHNAN. 1969. Oxygen consumption of mullet Liza macrolepis with special reference to swimming velocity. Mar. Biol., 4 (3) :239-243.
KUTTY m. N.,1972. Respiratory quotient and ammonia excretion in Tilapia mossambica. Mar. Biol, 16 :126-133.