The Matigu Seabeast; what is it / are they?

I am curious what information there is about the Matigu ‘Seabeasts’ I looked across the EVE Lore site and in-game but have not been able to find any information pertaining to the creatures themselves.

Is there anywhere with information describing these creatures?

Like a giant octopus/squid, a sailors fanciful tale but no actual truth.

Do you have any citable sources that I can see?

Do the SKIN items not include any information themselves? My recollection is that there was sometimes lore attached to them via the store they were available from as well.

The only other suggestion would be to look at Matigu (New Caldari I) itself, which happens to be an ocean planet.

Neither the SKIN nor the planet has any unique descriptions unfortunately.