My sump is infested with these

[Murraydar]

They’re all over the refugium section of my sump, definitely arrived when I ordered some macro algae. I’m guessing some type of sea hares but I’m not positive.

 

[paraletho]

My guess would be a flatworm of some type

 

[bradleym]

These are cute! If they’re not harmful, they’ll likely starve without whatever their natural food source is. Hoping they survive but aren’t harmful - it would be fun to have something cooler than sea hare show up in the hobby!

 

[Murraydar]

They aren’t too flat though, haha. They kinda take the shape of a squishy ball when they’re chilling. Here’s another pic of some of them and a video I just took.

 

[Murraydar]

These are cute! If they’re not harmful, they’ll likely starve without whatever their natural food source is. Hoping they survive but aren’t harmful - it would be fun to have something cooler than sea hare show up in the hobby!

They are kinda cute. I don’t see them doing anything but munching on algae so I’m not in a hurry to remove them.

 

[paraletho]

Yea that second group of images is a lot better representation especially the video. You can see the mouthparts working etc.

 

[iannarelli]

@ISpeakForTheSeas Any ideas?

 

[ISpeakForTheSeas]

They’re all over the refugium section of my sump, definitely arrived when I ordered some macro algae. I’m guessing some type of sea hares but I’m not positive.

Haminoeid (taxonomic family Haminoeidae) Headshield Slug/Bubble Snail (Cephalaspidean) - algae eater (including diatoms and some cyano, at least for some species); good CUC.

I don't know what specific genus/species it is at the moment (I honestly haven't looked much deeper into these than the family level yet), but I know a few - such as Haminoea orteai and Haminoea exigua - can look superficially similar to this in both body shape and coloration/patterning, and I know Haloa species have a very similar body shape too.

 

[Murraydar]

Haminoeid (taxonomic family Haminoeidae) Headshield Slug/Bubble Snail (Cephalaspidean) - algae eater (including diatoms and some cyano, at least for some species); good CUC.

I don't know what specific genus/species it is at the moment (I honestly haven't looked much deeper into these than the family level yet), but I know a few - such as Haminoea orteai and Haminoea exigua - can look superficially similar to this in both body shape and coloration/patterning, and I know Haloa species have a very similar body shape too.

Neat. I looked up pics of those species and they look very similar. Sea slugs it is, thanks!