The B/W works here, because you've re-livened your subjects, and at first glance, they appear to be caught in mid-leap. The sculptor of this piece would've been pleased. Nice job.
A very engaging photo! My suggestion would be to move the framing about 10% to the right. That would depict the otters cascading into the picture instead of out of it. Other than that tiny nit, well done!
VFS-TicK