Editing Lagoon triggerfish (section)

{{Short description|Species of fish found in the Indo-Pacific region}}
{{Speciesbox
| image = Picasso.triggerfish.arp.jpg
| status = LC
| status_system = IUCN3.1
| status_ref = <ref name="iucn status 9 February 2023">{{cite iucn |author=Matsuura, K. |date=2022 |title=''Rhinecanthus rectangulus'' |volume=2022 |page=e.T193713A2264564 |doi=10.2305/IUCN.UK.2022-2.RLTS.T193713A2264564.en |access-date=9 February 2023}}</ref>
| genus = Rhinecanthus
| species = aculeatus
| authority = ([[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]])
}}

The '''lagoon triggerfish''' ('''''Rhinecanthus aculeatus'''''), also known as the '''blackbar triggerfish''', the '''Picasso triggerfish''', or the '''Picassofish''', is a [[triggerfish]], up to {{Convert|30|cm|abbr=on}} in length, found on reefs in the [[Indo-Pacific]] region.<ref name=FWP>{{cite web|url=https://www.fishwisepro.com/Species/Rhinecanthus-aculeatus-422|title=Species Rhinecanthus aculeatus Linnaeus 1758 |year=1758 |work=FishWisePro |access-date=19 April 2020}}</ref>

This species has been studied in a range of research contexts, from [[animal locomotion|locomotion]] to [[color vision]] research.