How does the euphausiid shrimp (Nematobrachion boopis) see?
The euphausiid shrimp (Nematobrachion boopis) is a crustacean in the order Euphausiacea. Its eyes belong to the vision type Crustacean (mantis shrimp, crab).
Measured in this species: colour and motion (flicker fusion). Measured colour or sharpness: a measured receptor set or acuity in this species; other dials come from relatives or group defaults. Every value below carries its evidence level and sources; nothing is typed by hand.
See your photo as the euphausiid shrimp (Nematobrachion boopis)This species is part of the full catalogue in the tool (full unlock). Your photo stays on your device.
What stands out
- It has one receptor class for colour, so it sees brightness but no hue.
- Its sharpest vision resolves 0.18 cycles per degree: the finest stripe pattern it can tell apart from grey.
- It stops seeing flicker at 33 Hz, against 60 Hz for people in this dataset, so fast motion looks choppier to it.[6][5]
- Activity pattern: nocturnal.
The six dials
Evidence levels: how the tiers work. "Measured" means a value measured in this species; "Estimated" values come from a close relative or an eye-size formula.
| Dial | Value | Evidence | Sources |
|---|---|---|---|
| Colour | Colour receptors 1 receptor class: 488 nm (MWS (green)) measured in this species | Measured | [1] |
| Sharpness | Acuity 0.18 cycles per degree median of 8 relatives in family Euphausiidae: Euphausia gibboides, Euphausia pacifica, Euphausia superba, Stylocheiron maximum, Thysanopoda cornuta, Thysanopoda cristata | Estimated | [2] |
| Angle between facets 1.6° median of 1 relatives in class Malacostraca: Phronima sedentaria | Group default | [3] | |
| Eye type compound eye | |||
| Field of view | No value in the catalogue. | ||
| Sharp zones (foveas) | No value in the catalogue. | ||
| Night vision | Activity pattern nocturnal group default: mode of tier-A values in vision type V27 within phylum Arthropoda (1 species: Ligia exotica) | Group default | [4] |
| Rods vs cones no rods (invertebrate photoreceptors) | Group default | [4] | |
| Motion (flicker fusion) | Flicker fusion frequency 33 Hz median of 1 rows (no bright-light flag) (behavioural/whole-eye ERG rows; all rows: [33.0]) | Measured (not re-verified) | [5] |
Related animals
- Euphausiid shrimp (Stylocheiron maximum) same vision type
- Antarctic krill same vision type
- Euphausiid shrimp (Euphausia gibboides) same vision type
- Euphausiid shrimp (Hansarsia megalops) same vision type
- Euphausiid shrimp (Meganyctiphanes norvegica) same vision type
- Euphausiid shrimp (Nematobrachion sexspinosum) same vision type
More crustaceans: all crustaceans with measured vision data.
Sources
- Porter ML. Crustacean photoreceptor lambda max compilation, Table 1-1 (dissertation, "Porter_2005" in VPOD); extracted from PDF by VPOD with tabula. github.com/VisualPhysiologyDB/visual-physiology-opsin-db
- Feller KD, Sharkey CR, McDuffee-Altekruse A, Bracken-Grissom HD, Lord NP, Porter ML, Schweikert LE 2021. Surf and turf vision: patterns and predictors of visual acuity in compound eye evolution. Arthropod Structure & Development 60:101002. doi.org/10.1016/j.asd.2020.101002
- Bagheri Z, Jessop A, Partridge J et al. 2022. A new computational model illuminates the extraordinary eyes of Phronima. PLOS Computational Biology. doi.org/10.1371/journal.pcbi.1010545
- Longcore T. 2023. A compendium of photopigment peak sensitivities and visual spectral response curves of terrestrial wildlife to guide design of outdoor nighttime lighting. Basic Appl Ecol 73:40-50. doi:10.1016/j.baae.2023.09.002. doi.org/10.5281/zenodo.8432720
- Inger R, Bennie J, Davies TW, Gaston KJ. 2014. Potential biological and ecological effects of flickering artificial light. PLoS ONE 9(5): e98631. Table 3. doi.org/10.1371/journal.pone.0098631
- Healy K, McNally L, Ruxton GD, Cooper N, Jackson AL. 2013. Metabolic rate and body size are linked with perception of temporal information. Animal Behaviour 86:685-696. Table 1. doi.org/10.1016/j.anbehav.2013.06.018
Every value cites its sources (all sources). Data: catalogue-v1, built 2026-09-29. Accuracy notes: how accurate is this?