Another quick post today, because this beast is just an undersea, rubber tube that spits venom. Weird, to be sure, but there’s not much else to it.
Lobalug
The one thing that isn’t clear in the vagueness of Fantastic Beasts was whether or not this thing can move. The rubbery tube description made me think this was something you might find attached to a coral reef. I suppose it could jet propel itself, the same way it constricts and shoots out venom, but I’m trying to avoid adding my own flair to each beast. A lot of the Beasts are written to be intentionally bland so that they can be hushed up by the Ministry, and a venom-powered rubber balloon would probably stand out to a deep-sea diver.
As for an encounter, I think the best bet is to use the Lobalug as a trap/hazard to be avoided. Attach them to the interior of a sunken city to make aquatic exploration more challenging.
Thank You For Reading
Here are the other D&D ready Fantastic Beasts. Have fun including them in your adventures!
Gamer Peak 