"But my discomfort with it does not trump there right for them to do what they want. If you want to eat a live octopus or boil lobster, that is on you my guy."
I think there is compelling evidence from the food and livestock industry as well as from research animal protections that in fact, the only way to achieve meaningful improvements in animal welfare is through regulation and enforcement. Humans actually do not have "rights" to mistreat animals when there is evidence for suffering caused, either in the food industry or in research. The only reason it is not criminal is because the lack of enshrined rights for the animal in question.
In general appealing to people's better judgement and personal moral framework when there are economic, cultural and other complicating factors, has not proven to be a good means of improving animal welfare. Scientific evidence for suffering, followed by legislation, followed by regulation, followed by enforcement, is how that happens.
The point of this bill is to enshrine in UK law the rights of animals to a humane death. The press about crustaceans and cephalopods is due to a specific clause in bill that permits the inclusion of invertebrate animals where evidence for suffering at slaughter exists.
Since there is evidence for suffering now in both groups, the argument is that legislation is the next procedural step in ensuring their welfare is protected - thereby ensuring that the animal's humane death does not come down to a lottery of whether or not an individual human holds the view that the animal has that right. That is the point of having laws.
Seems REALLY hard to regulate this, and if they do, I wonder what that does to the ceph-keeping trade (i.e., that's where regulators may turn next).
Only hard to regulate in the home. If the regulation bars sale of live animals and regulates/enforces more humane fishing practices, the availability of live animals subject to unacceptable slaughter practices will be very limited.
In general legislation on companion animals is very separate from that of industrial-use animals, so I doubt very much if this will have any effect on hobbyists.