Pumpkins & Piranhas

This event, which takes place from 5 to 8 p.m. tonight (last admission at 7 p.m.) at the Greater Cleveland Aquarium will feature an activity booklet spotlighting misunderstood animals, underwater jack-o’-lanterns, costumed diver interactions, Halloween-themed décor and music, appearances by the landshark mascot Finn, animal encounters and a rotating array of nightly entertainers. The event runs through Sunday.