How are angler fish and tripod similar?

Anglerfish and tripods are not similar in any biological or functional way. They are completely different things:

* Anglerfish are a type of deep-sea fish known for their bioluminescent lure, used to attract prey.

* Tripods are three-legged stands used to stabilize cameras, telescopes, and other equipment.

It seems there might be a misunderstanding or confusion. Perhaps you were thinking of something else?

Could you please clarify what you meant by "similar"?