See these four Maro articles for details
No Slot:
Archerfish (creature, small, flying, reach)
Blue Urchin (creature, small)
Chaos of Ants (creature, medium)
Artificial Shell (artifact, equip, indestructible)
Rampaging Hippopotamus (creature, large, trample)
Crab Walker (artifact, equip, indestructible, islandwalk)
Earthshatter Bomb (artifact)
CU01 — creature, small, flying, reach
CU02 — creature, small
CM01 — creature, medium
CC01 — artifact, equip, indestructible
RM01 — creature, large, trample
RC01 — artifact, equip, indestructible, islandwalk
RC02 — artifact