On NU I just saw there was a new romance-fantasy novel being translated where some guy (according to the title) picks up a slime. Being that it's not a yaoi and it has romance, the slime is probably a girl. This got me to thinking: "are there no male slimes in manga or novels?" Which ultimately led me to asking the question here.

Almost everyone knows Rimuru from Tensei Shitara Slime Datta Ken.

So excluding him, I'm curious and want to know what other male slimes there are.

Slime Life is the only other one I know of.

Slime from Ragna Crimson

Clotho in Kuro no Shoukanshi
The slime in My Special Squishy Someone (Very much an adult manhwa, plus the slime is sometimes transformed into a woman soo...)
Bomby Girl to Slime Boy - Fuwa Puni Suite Room (Right there in the title. Untranslated as far as I know. Also adult/smut)
Marlin in Slime Tensei. Taikensha ga Youjo Elf ni Dakishimeraretemasu
Sui in Tondemo Skill de Isekai Hourou Meshi might be male, hard to tell and the manga doesn't really specify.
There is another slime of indeterminate gender in [m]Hazure Waku no [Joutai Ijou Skill] de Saikyou ni Natta Ore ga Subete wo Juurin Suru made[/m]

~4400 manga completed
~1700 ongoing...

https://www.mangaupdates.com/series/5ojazp5/the-monster-male-lead-living-under-my-bed

i‘ll just drop this here because it fits

Courage is the magic that turns dreams into reality.