Introduction
This is a high-quality manta ray model, including multiple 4K maps in the UDIM format, rigging, and animation. This model is made with Blender and Cycles renderer at real-world scale.
It consists of 4 objects: Body, eyes, gill01, and gill02.

Polygons
Body: vertices 50,050 polygons 50,064
Eyes: vertices 6,826 polygons 6,794
Gill01: vertices 13,684 polygons 13,684
Gill02: vertices 14,500 polygons 14,480
Total: vertices 85,060 polygons 85,022

Formats
There is a Blender project and an OBJ file.

Textures
MantaRay_BaseColor.1001.png, 4096*4096
MantaRay_BaseColor.1002.png, 4096*4096
MantaRay_BaseColor.1003.png, 4096*4096
MantaRay_BaseColor.1004.png, 4096*4096
MantaRay_BaseColor.1005.png, 4096*4096
MantaRay_Normal.1001.png, 4096*4096
MantaRay_Normal.1002.png, 4096*4096
MantaRay_Normal.1003.png, 8192*8192
MantaRay_Normal.1004.png, 4096*4096
MantaRay_Normal.1005.png, 4096*4096

Rigging
Created with the Blender armature system, and controllers are equipped with features are as follows:
CTR_root.M controls the whole model.
CTR_gravity.M controls the animation of the body.
CTR_spine_a-e.M controls the rotation of the spine.
CTR_mouth.M controls the opening and closing of the mouth.
CTR_chest_a.-c.M controls the breath movement.
CTR_IK_tail_a-d.M controls the rotation of the tail.
ROOT_pectoral fin_a.L/R and ROOT_pectoral fin_b.L/R control the rotation of pectoral fins.
The character is with UI control.
Note: The two animations in the project are rigged separately.

Animations
Loopable swimming animation at 30FPS, frame range 0-60;
Unlooped swimming animation at 30 FPS, frame range 0-370.

Features
The model is in meter units at real-world scale.
Put the model in the scene to render without any cleaning.
No lights and cameras.
The Multiresolution modifiers are kept on the body and Gill01. To save hardware resources, the Display and Render are toggled off by default.
The texture maps are baked based on the meshes with Multiresolution modifiers. Please turn on the Multiresolution modifiers when high subdivisions are needed.