Sea Angel
Weirdness 10/10

The tiny angelic sea slug that fires tentacles from its head

This delicate little angel flies through the water, then fires six tentacles out of its head.

📋 Fact File
🐾 Mollusc (swimming sea slug)🍽️ Carnivore (eats only sea butterflies)
📏 Size
About 1-2 cm (less than an inch) long
About the size of your thumbnail
Lifespan
Up to about 2 years
Not EvaluatedIt is not on the Red List, but ocean acidification makes it harder for its only food, sea butterflies, to build their shells.
🤔 Guess first

Which one is REALLY true about the Sea Angel?

The short version

The sea angel is a swimming sea slug about a centimetre long with a transparent body and two flapping wings. It hunts sea butterflies: six grasping tentacles shoot from its head, seize the shell, and it slowly pulls the animal out to eat it before the tentacles retract again.

Why it's so weird

  • The Sea Angel is a swimming sea slug barely a centimetre long, with a body you can see straight through.
  • The Sea Angel flies through the water by flapping two wings, which is how it earned its angelic name.
  • The Sea Angel hunts sea butterflies, another kind of swimming snail, despite looking completely harmless.
  • The Sea Angel shoots six grasping tentacles out of its own head to seize a sea butterfly's shell.
  • The Sea Angel holds on for hours, slowly dragging its out of its shell before the tentacles retract again.
📏 How big is it, really?
Sea Angel
2 cm
Sea Angel
a 7-year-old
1.2 m
🧒

You could line up about 61 of them along a 7-year-old!