The blue angel sea slug looks like an alien.

2. The blue angel sea slug looks like an alien
3. is a species of sea slug nicknamed the “blue angel.” This otherworldly creature is as rare as it is beautiful and is only found on the coasts of South Africa and Australia.
4. The slug’s mesmerising looks belie a dangerous nature.
   The blue angel is carnivorous and feeds on other venomous sea creatures, such as the Portuguese man o’ war. It collects the venom from its prey in specialised sacs, concentrates it, then uses the venom on future prey.

The blue angel sea slug looks like an alien.