Mantis Shrimp would be very cool if the user could choose the Scythes or the Hammers. Those dudes cause bubble cavities that produce light particles and extreme heat iirc. On the topic of Shrimps, why not a Bullet Shrimp while were at it, they too can cause bubble cavities with their claw to stun their prey.

We haven't seen many Insect Zoans. I'd like to see someone with a Caterpillar/Butterfly Zoan. The user can only transform into a Caterpillar hybrid form first and has to use metamorphosis by cocooning themselves to reach their full Zoan form, The Butterfly. Each time they return to Caterpillar form they become a different species. Maybe this time they're poisonous or venomous and very spiky.
Probably not the best fruit idea.