Giant shark「carcharodon megalodon」and a mysterious sea monster「Paleoparadoxia」

(nsfw:1.5),NSFW, sfw ng_deepnegative_v1_75t, ((badhandv4)), (worst quality:2), (low quality:2), (normal quality:2), low-res, multiple bodies, bad anatomy, bad hands, normal quality, ((monochrome)), ((grayscale)) watermark, bad legs, bad arms, nipple, unnatural