The only memorable thing is the Enterprise rising out of the water. And that's just a cool visual effects shot for the sake of it, but there was no meaning behind it.
And even then the whole concept made no sense whatsoever.
The planet they were at seemed to be pre-industrial, so no form of sensor technology. The ship could have stayed in orbit and monitored the cultural study and then planet-saving mission(s)--every other starship sent to observe pre-warp cultures manages to do it just fine from space. Also if the volcano was so destructive that it would wipe out the planets population, why risk the ship by having it anywhere near the surface?