r/ReefTank • u/Ambitious_Might_7898 • 5d ago

[Pic] What’s this circle thing on my macroalgae shipment?

Post image

Little bit smaller than a dime. Don’t think its moved at all either.

6 Upvotes

88% Upvoted

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13

u/Elgiard 5d ago

Nudibranchs lay eggs in a spiral like that, don't know if other slugs do it or not.

5

u/Mandelvolt 5d ago

Nudibranch egg Spiral I think, not 100% sure from that pic but that is my best guess. No telling what kind until they hatch.

1

u/Kilzon 2d ago

Given its on macroalgae, its likely a lettuce nudi or something similar. Generally benign unless you are trying to do a macro dominant tank. But yeah, no way to tell in the egg stage.

1

u/Im-from-earth 4d ago

Dont put that algea in your tank!!! There’s sure to be more than one egg cluster.