Many Sea Anemones live this way, and hold water within their bodies, squirting it out when squished. They often live intertidally, and "flower" when the tide comes in. One of the best places to find food for organisms that are fixed to the bottom happens to be rocks and other things in the zone between high and low tides. I would doubt that it is a Tunicate , or Sea Squirt, as they have two siphons, and this thing has only one pore. I have seen many of these on the Georgia coast.

Hi, they look like cabbage worms (but could be rose slugs too). I would try BT on the leaves. You can get it premixed in a hand sprayer or a concentrated formula that you mix yourself and pour into a spray bottle. Spray it on the leaves every 2 weeks (or right after a rain). It's toxic to any caterpillars or worms that are eating the leaves and leaves everything else alone. I use it to keep skeletonizers off my grape vines and it works great.

Omgosh, U have sprouts!! If I were u , I would Cut the rotting parts of the tubers out & get some root stimulator. Bonide root & grow or Fertilome root stimulator are the bomb! Without it I wouldn't have as many plants as I do now it's a plant savor! U can Pot up the sprouts w/ what's left of the tuber ( after cutting out the mushy stuff) into a light organic potting Mix & water well w/root stimulator ( follow directions on back) I planted 42 tubers this year - out of 42 , 4 of them rotted -lucky ducky barely had ANY tuber left but I was able to save them all bc of the root stimulator:) :) while the remaining good parts of the tuber slowly start to rot again - I'm guessing- it fed the sprouts until they were able to grow new roots. After a week & half or so - I went & carefully dug up the sprouts to see that the rest of the tuber rotted around the sprout but the sprouts grew their own roots- whoopie!! I was able to save jens wedding, lucky ducky, new dimension & blue bayou by doing this :) if it's really hot right now where u live, I would keep them in shady spot until they root. I also used smaller pots so I didn't rot the remaining parts of the tuber faster than it could grow roots & so I could also keep an eye on the water saturation, ect.. good luck ! :) :) :)

@rosecanadian me too. I hate snakes so it defintiely would have done its job and scared me off 😂 Pretty awesome though.