Hello OB,ob said:Regardless of latitude, I would place most of my life's savings on Southern Right Whale, mother and calf, the latter distinguished by its (juvenile) lighter colouring. "Tentacles" are merely their frothy wake
Interesting idea, but you'd expect the wakes to be, well, in their wakes, i.e. next to what appear to be these objects' "tails." Unless...mother and calf (if that's what we're looking at) ascended vertically, executed partial breaches and then slid back and down on their tails, leaving frothy head-prints on the surface.
Perhaps Greg is right, and it's just a pair of hypersonic spy planes playing splashy-splashy.