Little fish’s ride on sea slug, video

From Practical Fishkeeping:

Check out this charming video of a minute goby hitching a lift on the back of a nudibranch.

The footage, uploaded onto Vimeo by liquidguru, features a Bullock’s nudibranch (Hypselodoris bullockii), which reaches a size of just 4-7cm, giving an idea of how tiny this goby must be.

A sea slug that is able to detach, re-grow and then re-use its penis has surprised scientists. Japanese researchers observed the bizarre mating behaviour in a species called Chromodoris reticulata, which is found in the Pacific Ocean: here.

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