This crazy mutated dolphin is very easy to tame. HOWEVER, you unlock its saddle at level 120, so it is basically useless until then. Just pet and feed, the usual stuff... Get a fast hibrid dino before, because the space biome has water physics. Why fast, you say? If you stay still for more than 1 second, you get eaten up by voidwyrms. They shock you and your tame, with absurd amounts of dps. Careful! The astrodelphis, however, is pretty casual... They don't inflict damage at all, besides their bomp attack. Once you get it, focus on other stuff besides movement speed, since its tek saddle, when crafted, gives it a ton of rocket power. Cool flier, cool speed, cool rocket saddle. Good luck!