Hi, the first two comics in this series are pretty interesting, I wish you luck.
The spaceship looks a lot like a dolphin, was that the intent?
Also, any ship traveling at high velocity would have to have some type of protection against tiny bits of matter. On star trek they have navigation shields (which come on automatically when the ship is moving) and a deflector which sends out an energy pulse that shoves matter aside like a big snow plow.
This alien ship would have to have something like that that failed for this to happen.
(Terry Pratchett said the audience will swallow a huge lie, but choke on a little fib. Aliens, no problem - alien ship being brought down by tiny chunk of matter, big problem.)