What we got here is an otter body! And a tail, which is detachable with some snaps, and can hang on a beltloop when it's worn out of fullsuit.
So, first picture the DTD is in it, second it's not, hence the sudden sucked-in ribs XD
All the padding is polyfil pillows, and almost the entire suit is lined with elastic thread, so there shan't be bagginess! The strippy-stripes actually fill out when the suit is being worn.

See that tail? It's a big ol' tail :D It drags the ground. And if someone steps on it too harshly, it'll un-snap instead of ripping. You can see the snappy bits on the bum in the last picture.

He also has a dropped crotch for that extra otter-y look :D