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Aptocyclus ventricosus Juvenile | Smooth Lumpsucker

This is a 7mm-long juvenile smooth lumpsucker (Aptocyclus ventricosus) with its mouth open, sitting on Colpomenia sinuosa algae. The white crystals are grains of sand, which provide a sense of scale. This fish grows to a size of around 40cm and is known from Northern Pacific waters down to 1700m depth. It is the only known member of its genus. Photographed at four times life-size magnification.

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Filename: aptocyclus-ventricosus-juvenile-smooth-lumpsucker-japan-201803-0191.tif
Copyright: Copyright Tony Wu. All rights reserved. No duplication, reproduction or usage without prior written permission.
Image Size: 6855x4570 / 89.7MB; https://www.photoshelter.com/support/license#rm; https://www.tony-wu.com/contact-tony-wu; Bony Fish Lumpsucker Animalia Chordata Osteichthyes Actinopterygii Perciformes Cyclopteridae Smooth Lumpsucker Aptocyclus ventricosus Smooth Lumpfish Hotei-uo Juvenile Open Mouth Deep Ocean Deepwater Super Macro Pacific Sea of Japan Japan Toyama Prefecture
Contained in galleries: Say Ahhhhh!, Fish Photos, Super Macro, Marine Life | Japan

This is a 7mm-long juvenile smooth lumpsucker (Aptocyclus ventricosus) with its mouth open, sitting on Colpomenia sinuosa algae. The white crystals are grains of sand, which provide a sense of scale. This fish grows to a size of around 40cm and is known from Northern Pacific waters down to 1700m depth. It is the only known member of its genus. Photographed at four times life-size magnification.