I really dpn't know what to make of the creatures. I thought of tagging them "Petri Dish Creatures" or creatures from the deep or perhaps they are the ghoulish creatures H.P. Lovecraft wrote about in his "The Shadow Over Innsmouth".
"And yet I saw them in a limitless stream—flopping, hopping, croaking, bleating—surging inhumanly through the spectral moonlight in a grotesque, malignant saraband of fantastic nightmare. And some of them had tall tiaras of that nameless whitish-gold metal . . . and some were strangely robed . . . and one, who led the way, was clad in a ghoulishly humped black coat and striped trousers, and had a man’s felt hat perched on the shapeless thing that answered for a head. . . .
I think their predominant colour 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."
The Shadow Over Innsmouth, H. P. Lovecraft