I don't think being playful with the use of "sex" in the headline is weird. The article is more infotainment than hard science. Its audience might not necessarily know about spawning, and for all intents and purposes, using "sex" to mean "reproduction" generically as a figure of speech isn't really a stretch.
We've taken sex out of the title and made it as boring (in that respect!) as possible.
(To do this, btw, I found a representative sentence from the article text.)
:-(
If the article really claims that anchovies don't have sex, then you have saved me ten precious minutes of my life. Thanks.
The article mentions it in passing. This isn't a controversial claim or anything; it's very common in fish.
Let me fix it for you. It must say: All fish species have sex.
I would even dare to say that a few even have better sex than us.
You want to replace accurate information with lies?