Upwelling
The major upwellings in the ocean are associated with the divergence of currents that bring deeper, colder, nutrient rich waters to the surface. There are at least five types of upwelling: coastal upwelling, large-scale wind-driven upwelling in the ocean interior, upwelling associated with eddies, topographically-associated upwelling, and broad-diffusive upwelling in the ocean interior.
Eldon's galaxias
Unlike the more well-known 'whitebait' "Galaxias" species, "G. eldoni" is not diadromous; its entire life is spent in fresh water. It is long-lived, 15 years or longer; some fully-grown individuals have been tagged and then recaptured 10 years later. It is slow growing, reaching maturity at one (males) or two years (females). Females produce low numbers of large eggs during October. Spawning occurs at the stream edge in riffles, and eggs are laid directly into the stony stream bottom. Larvae hatch 4–6 weeks later. The larvae are large and are able to swim effectively; they do not disperse far from where they were spawned.