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. 2017 Feb 24;8:105. doi: 10.3389/fphys.2017.00105

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Copyright © 2017 Chung and Marshall.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Tubular eyes and fovea of B. abyssicola and potential function. The fovea and tubular eyes could maintain binocular stereopsis and preserve both resolution and sensitivity over a restricted frontal area where is critical for searching prey or mates. (A–D) The fovea of B. abyssicola. Arrows indicate the fovea. (D) A histological section of the fovea which the longest photoreceptor is c.a. 500 μm. (E) Illustration of potential function using the tubular eyes in detecting bioluminescent point sources. Scale bar: 500 μm.