This is my theory.
If you look at the circled area (day) one can clearly see that this is the shallow region of the
Sea of Japan. Also it's in the south (closer to the equator). Combine that with 'shallow' waters
and you get warmer water.
Now look at the same area (night) and the 'lights' are in the same area, and to a certain degree
align with the most shallow areas. And what likes that habitat...Quote,
The zooplankton community shows low variance in taxonomic groups and species. Five zooplankton groups account for over 99 percent of the biomass:
copepods (Neocalanus cristatus, N. plumchrus, N. flemingeri), euphausiids (Euphausia pacifica, Thysanoessa longipes), chaetognaths (Sagitta elegans),
amphipods (Themisto japonica, Primno macropa, Cyphocaris challengeri), and mysids (Meterythrops microphathalma). Diatom blooms occur primarily in
the spring. The number of benthic species decreases with depth, with 53 species of macrobenthos at 1,000-2,000 m, 25 species at 2,000-3,000 m, and 5
species below 3,000 m (see Zenkevitch, 1963; and Terazaki, 1999). Tropical to Arctic animal populations occur in the Sea of Japan LME.
Links to above regarding (bioluminescence)
and last but not least
Hippocampus mohnikei : (Japanese Seahorse)
Btw, I wouldn't be suprised if there were heaps of trawlers in this area as dried Seahorse is
a highly demanded Chinese remedy. Who knows, maybe the Japanese catch them and sell
them to the Chinese like any other high-end export...lobster etc?
Anyhoo, that's my theory and I'm stickin' to it,