system
Given the following post, respond as if you're commenting on Reddit:
human
Is the shape and general make-up of sperm identical, or at least similar, amongst all sperm producing animals?

While watching a program on television documenting creepy sea creatures, they filmed a sea cucumber producing sperm in hopes of it finding eggs. I know the shape and make up of individual human sperm, I would assume it would be similar in chimpanzees (but maybe not?), but what about in animals such as sea cucumbers?
gpt
Oh man, not even! For example, some species of fruit fly have sperm tat are multiple times longer than the fly itself. Some species have heterogeneous populations, some being incapable of fertilization but serving as 'blockers', some even being hunter killer sperm!

Check out Sperm Wars. It's a rad book.