Not sure about this one, but it's odd

https://www.legacysurvey.org//viewer/?ra=22.3385&dec=0.6549&layer=hsc-dr2&zoom=16

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I wonder if this could be multiple projections of a background galaxy being lensed by the cluster at the centre?

this was reported as a strong lens candidate in this paper Finding Strong Gravitational Lenses in the DESI DECam Legacy Survey - NASA/ADS

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yes, that is what I imagine it is.

yes, that is what I thought it was