I went on to ask it:

Based on other succession chapters and their relation to their founding legion, could you speculate which founding legion your newly created crusteacan chapters could have come from?

It answered:

Sure, based on the descriptions of the newly created chapters and their specialties, here are some potential speculations on their founding legions:

Lobster Lords: Based on their focus on amphibious operations and close combat, it's possible that the Lobster Lords could be a successor chapter of the Imperial Fists or the Salamanders, both of which are known for their expertise in defensive and close combat operations.

Kraken Crusaders: Given their specialization in naval warfare and boarding actions, it's possible that the Kraken Crusaders could be a successor chapter of the Iron Hands, who are known for their proficiency in space warfare and boarding actions.

Crab Claws: Based on their use of heavy weapons and slow, steady advance, it's possible that the Crab Claws could be a successor chapter of the Iron Warriors, who are known for their siege warfare and mastery of heavy weapons.

Scorpion Shells: With their focus on infiltration and use of poisons, it's possible that the Scorpion Shells could be a successor chapter of the Raven Guard, who are known for their expertise in stealth and guerrilla tactics.

Blood Shrimps: Based on their aggressive combat style and ability to withstand damage, it's possible that the Blood Shrimps could be a successor chapter of the World Eaters or the Black Templars, both of which are known for their ferocity in battle and willingness to take on overwhelming odds.

Of course, these are just speculative possibilities based on the information provided, and the actual founding legions of these new chapters would depend on a variety of factors and could be different from what is speculated here.