fins

The woman in the photos is wearing swim fins, which makes an enormous difference.

Which usually means the shark fins are starting to circle, regardless of whether the folks in the boat have noticed the mindshare leak.

Killing sharks for their fins is also normal in several countries, that doesn't not make it an abomination.

Horizontal tail propulsion allow a faster pitch control for swimming creatures than vertical + horizontal fins.

Once the trajectory for landing is mostly established, the grid fins can be used to eliminate the vehicle rotation (3 DOF).

Give a freestyle swimmer the same fins and (s)he'll blow the underwater swimmer away.

It has fins on it to provide aerodynamic stabilization during the abort.

Now you can do cooling fins and support ribs and impossible snaking holes* and all sorts of stuff without needing additional machine setups or tooling.

I don't know whether the fins are actually used this way given the stresses involved.

Falcon 9's approach requires fins, some landing struTs and software.

It's hard to see how adding fins would improve it.

Obviously the crowd of non-scientist tourists who were expecting to just see some flukes and fins off in the distance were oohing and aahing like crazy.

If you are going to use DOF, you should also mention the grid fins (4 DOF (1)), and how control over parameters can be "time-shifted".

I bet it'll be titled "the era of internet tail fins" or something.

> I bet it'll be titled "the era of internet tail fins" This is my feeling as well.

This seemed odd to me (although I'm far from a marine biologist): "...would present his back for him to mount, taking care to conceal the spiny projection of his fins in their sheath..."

We're not as strong and mighty as the Fins, we use diplomacy and money to establish our sovereignty.