The Odd Encounter: Sellachocta

So, I recently discovered Into the Odd, a lightweight OD&D homage with a focus on quick entry into a Dark Sci-Fantasy setting. Absolutely love it, and thought I'd convert one of my favorite new bad monster movie monsters over.

Sellachocta
STR	DEX	WIL	HP	Armour
16	12	6	18	2

Amphibious predators that have recently infested the sewers of Bastion.
Slithering behemoths, these 6 meter long abominations resemble a mottled
shark, its tail replaced by undulating tentacles that composed two-thirds
of the thing's bulk. Ambush predators, the Sellachocta often lunge from
their murky habitats to seize prey in their jaws (2d6 damage). In lieue
of this, the Sellachocta will use its tentacles to try and snare potential
prey (1d4 damage). On Critical Damage, the target is captured and crushed
by the Sellachocta's tentacles, inflicting 1d6 Strength damage until the
tentacle is severed (2 points of damage or more).

Rumors exist of a variant species of Sellachocta, one able to manipulate the
texture and color of its hide. No such specimens have yet been found in
the sewers of Bastion. But then, such abilities would make the beasts
nigh impossible to detect...