Deep One

''I think their predominant color was a greyish-green, though they had white bellies. They were mostly shiny and slippery, but the ridges of their backs were scaly. Their forms vaguely suggested the anthropoid, while their heads were the heads of fish, with prodigious bulging eyes that never closed. At the sides of their necks were palpitating gills, and their long paws were webbed. They hopped irregularly, sometimes on two legs and sometimes on four. I was somehow glad that they had no more than four limbs. Their croaking, baying voices, clearly used for articulate speech, held all the dark shades of expression which their staring faces lacked ... They were the blasphemous fish-frogs of the nameless design—living and horrible. description of the Deep Ones in The Shadow Over Innsmouth ''

Deep Ones are a race of undersea-dwelling humanoids whose preferred habitat is deep in the ocean (hence their name). However, despite being primarily marine creatures, they can come to the surface, and can survive on land for extended periods of time. All Deep Ones are immortal; none die except by accident or violence, and can grow to massive size. The Deep Ones are humanoid beings with fish, human and amphibian-like traits, they are described as having grey-ish green, glossy and slippery skin with white stomachs. They have scaled, ridged backs, as well as webbed hands and gilled necks. Notably, they have a head similar to that of a fish, with eyes incapable of blinking.

They move about in an inhuman fashion, by hopping oddly, and occasionally moving on all fours. Deep Ones possess an abhorrent, croaking voices that speaks a language unknown to any but their race. Additionally, it is said that the race of Deep Ones are so horrid that their mere appearance can cause loss of consciousness for viewers.

Deep Ones attack by charging prey and use their massive claws and powerful maw to tear most things apart with ease. Upon a kill, the Deep One will distend it's jaw in preparation to devour any creature unfortunate to encounter them. Additionally, the Deep one possess the ability to retch and vomit a host of large partially digested fish with such force that contact with the foul attack melts and bludgeons most creatures to death within moments.

Deep One is a unique monster found in the Delta Freya II mission, Fd:Elder Core, Fd:Eldritch Field minibiomes. It is not captureable.

Professor Luna's Lab Notes
~ This creature is based upon Lovecraftian Horror - drawing much reference from the eldritch ideas of H.P. Lovecraft.

~ The Deep one possesses many different variations, and colors within their own race. There are five primary, each matching a varying type of common liquid found across the galaxy, showing just how adaptable and well spread their race likely is. Primary colors include: dark black, dark blue, deep green, lighter bluish green, pinkish flesh,

~ Boasting one of the widest arrays of resistances and invulnerabilities of any creatures, the Deep on has all of the following unique resistances and traits:
 * Bleeding Immunity 100%
 * Line Rifle Resistance 90%
 * Line Rifle Status Immunity 100%
 * Centensian Energy Resistance 90%
 * Centensian Energy Status Immunity 90%
 * Xanafian Resistance 90%
 * Xanafian Status Immunity 100%
 * Akkimari Acid Resistance 90%
 * Akkimari Acid Status Immunity 100%
 * Ignore Invisibility Effects 100%

Source:

https://github.com/sayterdarkwynd/FrackinUniverse/tree/master/monsters/walkers/deepone