Complex sentence: Female pinnipeds do appear to have some choice in mates, particularly in lek breeding species like the walrus, but also in elephant seals where the males try to dominate all the females that they want to mate with.
Split into simpler sentences: Female pinnipeds do appear to have some choice in mates, particularly in lek breeding species like the walrus. Even in elephant seals where the males try to dominate all the females that they want to mate with.