The Strange Mystery of the Barreleye Fish

The Pacific barreleye fish is a unique deep-sea creature with tubular eyes and a transparent head. Its eyes, located behind its nares, are adapted to gather light and focus on prey above. The fish's green eyes help filter sunlight, enhancing its ability to detect bioluminescent prey. Researchers discovered that the fish can rotate its eyes to look forward, aiding in feeding. The transparent head protects its sensitive eyes from stinging tentacles. Despite these adaptations, much remains to be learned about this elusive fish.

What is a unique feature of the Pacific barreleye fish that makes it difficult to study?

• Its loud vocalizations

• Its transparent head

• Its ability to change color

• Its rapid swimming speed

How do the tubular eyes of the barreleye fish help it in its environment?

• They enable it to see farther away, like binoculars

• They help it detect predators from behind

• They allow it to see in complete darkness

• They allow it to see in all directions at once

Why might the barreleye fish's eyes be green?

• To attract mates

• To scare away predators

• To filter out sunlight and enhance bioluminescent prey visibility

• To blend in with the ocean floor

What protects the barreleye fish's eyes from stinging tentacles?

• A transparent head filled with fluid

• A hard shell covering

• A layer of thick scales

• A special mucus coating

How does the barreleye fish manage to eat its prey despite its upward-facing eyes?

• It uses its sense of smell to locate food

• It relies on other fish to bring food to it

• Its eyes can rotate forward to see its prey

• It has a long tongue to catch food