A feature of satire is strong irony or sarcasm —“in satire, irony is militant”, according to literary critic Northrop Frye—[2] but parody, burlesque, exaggeration,[3] juxtaposition, comparison, analogy, and double entendre are all frequently used in satirical speech and writing.
I think seahorse was being ironic/sarcastic
It’s a meme lol
https://knowyourmeme.com/memes/eat-hot-chip-and-lie
Edit: Which means that yes, it’s satire.
One feature doesn’t make the whole.
A satire must also classify as art form, apart from that feature.
I think seahorses comment is an art form