West Coast Eagles forward Liam Ryan.
The social media comments were directed at West Coast Eagles forward Liam Ryan after he was reported for striking Brisbane Lions defender Darcy Gardiner.
A post on the official AFL Instagram account of Channel 7 -- a broadcast partner -- asked fans if the indigenous player should be suspended, to which some responded with racist language.
"Where did they get this monkey from Melbourne zoo?" wrote one, while another posted: "The monkey should be banned for life."
The abuse came just days after leading AFL women's player Tayla Harris slammed online trolling of an action shot of her kicking a goal as "sexual abuse".
She lashed out after the athletic image of her playing for the Carlton Blues attracted a series of derogatory comments on social media, with her stance winning widespread support.
AFL Players Association chief Paul Marsh called for changes to remove people's online anonymity.
"More hatred directed at one of our players. This ongoing issue needs to be addressed at the source.
The West Coast Eagles are based in Perth.
"Change is needed so that these gutless people can't hide behind anonymity."
Ryan's West Coast teammate Nic Naitanui tweeted that "these fools need to be held accountable at some stage" after posting screenshots of the offending comments to bring attention to the issue.
In the wake of the Harris controversy, AFL chief executive Gillon McLachlan admitted it was difficult to identify offenders who attacked athletes on social media, calling it "a challenging space".
The West Coast Eagles are based in Perth and Western Australia Premier Mark McGowan called on the operators of social media platforms to do more to prevent the spread of derogatory comments.
"Vile, sexist, nasty, sexist, horrible commentary posted by people who think they can get away with has gone on too long. It's time it stopped.
Aussie Rules, Australia's biggest spectator sport, similar to Gaelic football but played with an oval ball, has been blighted by racism in the past.
In 2017, a fan accused of racially abusing indigenous player Eddie Betts was banned. The same player also had a banana thrown at him.
Adam Goodes, one of Australia's most high-profile indigenous sportsmen, retired from Aussie Rules in 2015 after he was subject to repeated booing.
Many believed it was racially motivated and stemmed from him taking exception to being called an "ape" by a spectator in 2013.
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