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New deep-sea sighting: The barreleye fish has a transparent head and tubular eyes

I spy with my barreleye, a new Fresh from the Deep! During a dive with our education and outreach partner, the Monterey Bay Aquarium, the team came across a rare treat: a barreleye fish (Macropinna microstoma). MBARI’s remotely operated vehicles Ventana and Doc Ricketts have logged more than 5,600 successful dives and recorded more than 27,600 hours of video—yet we’ve only encountered this fish nine times! The barreleye lives in the ocean’s twilight zone, at depths of 600 to 800 meters (2,000 to 2,600 feet). Its eyes look upwards to spot its favorite prey—usually small crustaceans trapped in the tentacles of siphonophores—from the shadows they cast in the faint shimmer of sunlight from above. But how does this fish eat when its eyes point upward and its mouth points forward? MBARI researchers learned the barreleye can rotate its eyes beneath that dome of transparent tissue. Aquarist Tommy Knowles and his team were aboard MBARI’s R/V Rachel Carson with our ROV Ventana to collect jellies and comb jellies for the Aquarium’s upcoming Into the Deep exhibition when they spotted this fascinating fish. The team stopped to marvel at Macropinna before it swam away. MBARI is working with the Aquarium to bring the deep sea to you next spring. Into the Deep will bring you face-to-face with deep-sea denizens like bloody-belly comb jellies, bubblegum corals, and Japanese spider crabs. Learn more about the barreleye fish in our Creature feature: https://mbari.co/BarreleyeFish Find more fascinating creatures: https://mbari.co/CreatureFeature Learn more about Into the Deep: https://www.montereybayaquarium.org/visit/exhibits/into-the-deep Editor: Kyra Schlining Music: Horizons (MotionArray) Follow MBARI on social media: Facebook: https://www.facebook.com/MBARInews/ Twitter: https://twitter.com/MBARI_News Instagram: https://www.instagram.com/mbari_news/ Tumblr: https://mbari-blog.tumblr.com LinkedIn: https://www.linkedin.com/company/monterey-bay-aquarium-research-institute-mbari- Follow the Monterey Bay Aquarium: We're on Twitter: https://twitter.com/MontereyAq And Facebook: https://www.facebook.com/montereybaya... And Instagram! https://www.instagram.com/montereybay... And Tumblr! https://www.tumblr.com/blog/montereyb... And Twitch! https://www.twitch.tv/montereyaq TikTok now too whaaaat: https://www.tiktok.com/@montereyaq
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