Finding the Stoplight Loosejaw in the Stellar Basin took me so long that I thought I should save other people some time.
Stoplight Loosejaw for Stellar Basin’s researcher quest
The researcher gives you this Kraken suppression device to activate and asks you to use it to get, among other things, a ‘Stoplight Loosejaw’. Took me forever to find one because not only did they just mean a REGULAR Loosejaw, there aren’t even any in the threatening range of the Kraken. The two closest spawns I could find at the Stellar Basin were on the outer perimeter, not the interior of the Basin.
Of the two locations, the first is easier at around D5-6: Facing the Old Fortress:
The second is to the southeast of the basin around H1-2:
I don’t even know if spawns are randomized or predefined. Hopefully the latter so I didn’t just waste 5 minutes. Cheers.