Sam's a pretty famous cat, but unfortunately his story doesn't line up very well.
For starters, none of the surviving members of Bismarck recall a cat being on board, nor are there any photos of him on board (although it's possible there were and they went down with the ship).
Next is the fact that HMS Cossack was not actually one of the ships engaged in rescuing survivors from Bismarck so the chances of her spotting and then stopping to pick up a random cat in the middle of the ocean are relatively low.
Later on when he's supposed to be rescued from a sinking HMS Ark Royal, the ship sank pretty slowly producing little wreckage while most of the crew were evacuated in good order, so if he was bored he probably would have been evacuated with the rest of the crew during the relatively calm evacuation.
Lastly, there's the fact that there are two different versions of "Unsinkable Sam," with one instance of him being a black and white cat, and the other being a slightly chonkier tabby.

To Adelaide! To Adelaide!

r/rimjob_steve

Daughter of the dún
Terror of the west
Sailed the coasts of Ireland
With O'Malley on her crest

Is that ice?

The way I thought it worked is venom potency is judged by how much a single dose could do. One dose would be measured as the average venom released during one bite or sting in a lab setting. In practice however, it's very likely that they will get thrown off or bitten or something before they can get that full dosage into a target (predator or prey), so whatever tiny amount they do get into them needs to be lethal. Therefor, while a full dose may be able to kill something like 40 adult humans, in practice it would only get out maybe 1/10 of that in an actual attack.
Still powerful, but makes more sense than hyper excessive evolution.

I wonder if Isukriri was immaculately conceived as well?
Poor Joseph.

Do you remember when, when the Nazis forced their rule on Poland 1939 and the allies turned away!

Number two: don't kink shame me

Interestingly, the vampires from Twilight actually come pretty close to this. Especially in Midnight Sun, and The Short Second Life of Bree Tanner, you see them basically just being "people" with supernatural abilities.
Things like, speed reading bookstores at a time, playing mega 8 board chess (and cheating with foresight), going on a "hiking" trip to the other side of the continent, etc.
The underwater thing comes up as well, but only in the context of using it to throw off trackers, or as a simple obstacle (see: the english channel).

The true Arcane Trickster is a product of their own hubris.