User blog comment:BlueFrackle/Feral Rap Battles of the Animal Kingdom II: Tardigrade vs. Immortal Jellyfish/@comment-25263388-20150707171842/@comment-25263388-20150707175208

Star-Nosed Mole vs Aardvark seems obvious, unless Aardvark already planned

Sacculina vs Candiru

Not sure for Pyrosome, but goodled it and interesting af

The Hydra vs Seahorse - waterfaring animals which have unique reproduction styles