Here are the possible solutions for they feature creatures clue
Answer
Clue
Relevancy
zoos
Clue
They feature creatures
coral
Clue
Creatures that can't move but have sex by constantly and simultaneously ejaculating on a full moon once a year. It's called "broadcast spawning" and there are videos and they are glorious
Definition
a mass of marine animal skeletons
ent
Clue
"Lord of the Rings" creatures that must speak in tiny, high-pitched voices when they're seeds
beadyeyes
Clue
Ratlike feature, and a hint to a feature of the four starred answers
effects
Clue
Creature feature feature
Definition
EFFECT, to bring about
fruitfilling
Clue
Pie feature, or feature of this puzzle's other four longest answers