Medieval Bestiary
bestiary.ca
bestiary.ca
Sailors talk some complete twaddle at the best of times (I live close to HMS Heron) but blaming a six inch fish for delays in deployment or delivery takes some neck!
I love this resource. I'll be hunting down a beast that delays IT systems deployment. Some sort of insect is indicated ...
The difference here is that these little beasties magically make a ship run slowly. I would bet real money that their invention was to cover up late delivery or whatever. Basically, an excuse that no land lubber of the time could possibly refute.
https://the-toast.net/2015/04/01/two-medieval-monks-invent-b...
Can east asian beasts be included? If so, I would suggest Qilin (Chinese) or Kirin (Japanese) (yes, the one on the beer label).
"It does not include beasts from non-European sources unless those beasts are the basis of Bestiary, Physiologus, or other Western beast legends."
That's a shame because there is a bit of an overlap throughout history of beasties finding a new home - far away from where they originated, thanks to an enterprising traveller spreading stories in passing.
https://en.wikipedia.org/wiki/Qilin and keep on reading and clicking to lose a few hours!
There's a cool little animation based on this - https://www.youtube.com/watch?v=57BTS-W_2QI