Final answer:
Larval Ant-lions capture their prey using long, narrow, flexible arms and movable spines. They are aquatic and can be predators, scavengers, or filter feeders.
Step-by-step explanation:
The larval ant-lions capture their prey by using their long, narrow, flexible arms which facilitate fast movement. They also have movable spines that they use for movement, defense, and sensing the environment. These larvae are mainly aquatic and can be predators, scavengers, or filter feeders. They have two pairs of antennae and claws for hunting, and a unique larval stage called "nauplius" with head appendages for swimming.