Rig and animate fish and sea creatures online
MonRig rigs and animates fish, sharks, rays, eels, dolphins, whales, seals and octopuses in the browser. Upload the mesh as FBX, GLB or OBJ, give it a skeleton (a starter skeleton you drag into place, a few clicked landmarks for Guided Rig, or Auto Rig's proposal), and every clip is generated from that skeleton, then baked as FBX and GLB for Unity, Unreal Engine, Godot, Blender or three.js. Rigging and previewing is free.
Body types
Fish (lateral-tail swimmer)
Swims with a side-to-side tail beat and fin strokes.
Starter skeletons: Simple fish, Shark, Ray / manta.
Cetacean (vertical-tail swimmer)
Swims with an up-and-down fluke pump, the dolphin motion, with pectoral fin strokes.
Starter skeletons: Dolphin / whale, Seal / walrus.
Tentacle crawler (octopus)
Scuttles on its arms, a curl travelling along the tentacles while the body pulses.
Animations
A new creature here starts with these 16 clips, generated for its body type:
Optional clips that suit this anatomy (each one checks the rig and says what it needs, such as a tail, wings or a head):
Clip names stay the same on every re-bake, so an Animator state that points at Walk keeps working. Each clip has dials that change how it looks, from the gait to the tail carriage.
Before you upload
Fish beat their tail side to side and dolphins and whales up and down; choosing the right one of the two is what makes the swim read true. One creature per file, in a neutral pose; MonRig rebuilds the upload from its geometry, so an existing skeleton in the file is replaced.
Fish and sea creatures rigged with MonRig
Other body types
Four-legged animals · Dragons and winged creatures · Insects, spiders and crabs · Snakes and serpents · Birds · Humanoids and two-legged characters · Dinosaurs and reptiles · Slimes, ghosts and blobs