What kind of galaxy is this???

This illustration compares the size of our own Milky Way galaxy to gargantuan galaxy LEDA 1313424, nicknamed the Bullseye. The Milky Way is about 100,000 light-years in diameter, and the Bullseye is almost two-and-a-half times larger, at 250,000 light-years across.
NASA, ESA, Ralf Crawford (STScI)
Many of us are familiar with several types of galaxies, but what the heck was this?