en
Download

Nature

How long is a blue dragon sea slug?

An adult blue dragon sea slug has a total length of about 3 cm (1.18 in).

What is measured: adult total length

Blue dragon sea slug (3 cm) drawn to scale beside a large coin (2.4 cm) and a smartphone (14.7 cm)
Drawn to scale, from left to right: Large coin (2.4 cm), Blue dragon sea slug (3 cm) and Smartphone (14.7 cm).

Compare

How big is that, really?

  • About 2 would fit end to end along a credit card
  • About 1.3× the width of a large coin
  • As long as about 4 grains of rice end to end
  • About 4 would fit end to end along a smartphone
  • About 15× the width of a raindrop

Learn

Facts about Blue dragon sea slug

The blue dragon floats upside down at the ocean surface and stores stinging cells from the prey it eats.

Source: Monterey Bay Aquarium — Blue Glaucus; Australian Museum — Blue glaucus

Nature

NameSizeCompared with Blue dragon sea slug
Common pill bug1.2 cm (0.47 in)0.4×
Gippsland giant earthworm2 cm (0.79 in)0.67×
Bargibant’s seahorse2.4 cm (0.94 in)0.8×
Blue dragon sea slug3 cm (1.18 in)this page
Garden snail3 cm (1.18 in)same size
Bee hummingbird5.5 cm (2.17 in)1.8×
Monarch butterfly9.5 cm (3.74 in)3.2×
Luna moth11.5 cm (4.53 in)3.8×
Venus flytrap15 cm (5.91 in)5×
Pygmy marmoset15 cm (5.91 in)5×

Test your sense of scale

Which is bigger: Blue dragon sea slug or Bargibant’s seahorse?

Topics

More sizes like this