EDIT #1 :
The Information I was seeking, (out-lined below), about how to "Get/find", the path to the South Beach, has surfaced in game !
I have taken a screenshot, for future reference . PS- It is connected to "Nel's" story-line, (directly) . Something I didn't know .
Back when I first played this game, I had little to no clue, how/where, to get/trigger, any areas, or events . . .
Still, I some how found the way down to the beach, (where the old guy is fishing off the Dock) . . .
But, now having played for a "few" re-starts, can't remember, or find, how to get/trigger, the way to that beach !
Also, those Electric Jellyfish, were the 3rd monster, my Celica, fought that very first playthrough.
The playthrough, just before this one, didn't get /find access, to that Beach, till
After fighting the "Rock Spitters", & the "Fire Rays", which seems, out-of-order, cause the Jellyfish, are not as tough as those other two, and they are "multiple enemies ", as opposed to the one Jellyfish per encounter .
So, here I am again, trying to find/trigger, what's needed, to get to that Beach . . .
We really need some kind of, "Wiki", or Guide, to help find things like this . . .
Searching through 118 pages, and 2300+ posts, can be tiresome, and down-right annoying .