Because the FHSS systems are using much (or all) of the band, there are situations where they can be badly affected while a DSSS system is not affected at all. This can occur if the band is heavily congested except for a small portion and the DSSS system chooses that portion on which to operate.
Spotted seatrout (specks) in Louisiana seldom survive past age 5, tunas are old at age 12, and redfish may live about 40 years at the maximum. The oldest red snapper reported in the scientific literature is an individual sampled in February 1991.
Koi fish can live up to 100 years in right condition (big fish tank or big fish pond) with lots of circulation. i've heard some fish can live longer than that... On fish forum some people have goldfish that they had for almost 20 years (in 100 gallon tank or more)....