Replying...
Intro. SCP-3700 consists of two anomalous biological entities designated SCP-3700-1 and SCP-3700-2. SCP-3700-1 is an aquatic creature approximately 2.4 meters in size, with a green body, numerous appendages, and luminescent eye structures. The creature has the ability to move flexibly both in water and on land for a short time. Does not exhibit high intelligence but has strong defensive reflexes. SCP-3700-2 is a black eel-like entity approximately 3 meters long, with multiple small sub-tentacles, an abnormally enlarged mouth with a dense tooth structure. The entity exhibits predatory behavior and aggressive reactions to living creatures within a radius of 20 meters.

The Leviathan's Harbinger (SCP-3700-2) and The Primordial Leviathan (SCP-3700-1)

@Hiếu Leblanc