Sure!
Hmmm. The purple worm is the same length and 40,000 lb., but I think it may be a bit smaller in cross section. On the other hand, the many-humped has air sacs, so maybe it's less dense. Want to go with 40,000-50,000 lb?
A many-humped sea serpent is a type of primitive whale. It has a single pair of flippers and a small fin near its head and a double-lobed tail. Along its back, stretching the length of the body, is a regular set of large humps, which are believed to be hydrostatic organs that provide stability as well as a reserve of air for long dives.
So are we ok with 40 tons? That's fine by me.
See, I think of the descriptive parts of that suggested background as too detailed for the actual description, which should be a rather short thing.
A long serpent-like creature with a row of humps running down the back. Or some such. But, then again, I'm pretty lousy at this sort of writing.
I can sympathize with the cat issue. Since one of ours passed last year, the remaining one often wants company starting quite early in the morning.
I still haven't been feeling inspired enough to do a description. Better luck tomorrow!
We certainly don't need anything that elaborate. So far we've been keeping the background & descriptions for these sea monsters fairly simple.
Hey, that looks good!

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.