im not playing right now but i can give you 2 caves :)
Approx 80:35 (on the rock just near the river, difficult to find if you're not aware the cave is here)
Approx 100:38 (easy to find, just walk around the mountain in the desert... Be carefull, there is a boss down the cave)

How bout penguins, anglers and black pearl scorpids ?

I read a patch note about underwater drops, does that refer to deep sea loot?

Not finding any cactus plants or resources. Are these on this map somewhere?

The two caves of InDaSkyz do not exist, but i found a cave witrh the Hunter srtifact inside.
Coords of the entrance is 64,9 Lat/69,4 Long there are Spiders, Snakes and Scorpions inside.

since last update theres no Cactus Sap - it was nearly the green - where is ist now - please change the yellow coloring ist to heavy!!! more caves with enemys und loot

I just spent almost 3 hours scouring the ocean looking for anglerfish, and didn't see a single one. Neither did I see any eurypterids. I believe I saw almost every other possible underwater creature, with the exception of the mosasaurus (4 plesios, 1 tuss, maaaaany leeds, bunch of basis, one dunkel, and pretty much Every Shark in Creation.) I'm fortunate in that I'm playing single-player or am admin on the servers I use, so I can just cheat in the gel I really need, but that's not an option for many. [EDIT: Did not see Ammonite, Electrophorus, or Liopleurodon, either.]

Confirmed:
* Cacti in the northeast desert - closer inland, not toward the edges of the map.
* Oil there, too, as well as 2 veins in 10 lat 55 long area.
* Obsidian, metal, and crystal are everywhere there's burning ground, as well as on a few mountains.
* Having a hell of a time find sand - the only stones I've found thus far were in the 55 x 40 area, as well as some in the same area as the cacti.
* Silica pearls are now in the ocean, not in the large lake.
* Snails seem to mostly congregate where the OP shows them.
* Sarco, beezul, bary, pelagornis, spino, salmon all in the large lake (though spinos may be farther down tributary rivers.)
* Titano exactly where the devs indicated on their spawn map.
* Sheep near titano, as well as 58 x 92.
* Jerboa in the north desert areas by the oi rocks.
* Wyvern nest in the middle of the mountain peak in northeast corner - you'll need a flyer, the mountain peaks in this game are not navigable on foot in the slightest.
* Quetz at 40 x 92.
* Castoroides in the big lake

Haven't been able to find the 2 oil veins previously mentioned: "Oil there, too, as well as 2 veins in 10 lat 55 long area." I've looked everywhere using a GPS.. where are they relative to the ruins in the area?