Crossposted from SB:
I want option 2 if the animal we are going for is a cat of some kind. Preferably a maine coon or an ocelot. Otherwise, I would say we should go for option 1.
The bio-engineered shrimp is a BAD idea. Why? because not only is it unusual in it's animal form, and thus impossible to blend in, not only does it require us convincing Panacea to make it for us, and good luck with that, but in its animal form it also cannot survive outside of water. Most likely, it would require specifically seawater, even. That negates about a third of the advantage that a GB or familiar brings to the table right there. Just... no. Never on your life. Like, if the rest of you are stupid enough to pick that against all common sense I will metaphorically find the person who first suggested it, and I will metaphorically end them.
It only got brought up because of the fact that canon Taylor has control over invertebrates, and the fact that the Worm fandom has become obsessed with creatures in that category that are capable of unusual things. Because of that, they tend to ignore the incredible things that other creatures are capable of whenever Taylor is involved with a question, even when Taylor's power in the story has nothing whatsoever to do with such creatures, like here.
Komodo dragon runs into a similar problem of difficulty to obtain and impossible to pass as normal that the shrimp has, though at least it can breathe on land. An ocelot does as well, but at least it makes up for it by being one of the cutest, most beautiful animals in all of creation. A Maine Coon is probably the best bet of them all in general, and they are often grey in coloration so naming one "Grimalkin" is a definite possibility.
Also crossposted from a different post on SB:
For all you people going on about some impressive aspect of this or that animal, let me expound to you for a moment on the virtues of cats.
Cats are in general pretty freaking impressive animals in literally every single way, but especially physically. Those claws of theirs are actually some of the most dangerous ones in the animal kingdom. Think about your average house cat, and what it can do. The kind of strength they need to jump over five times their length into the air, for instance. Above all, they are fast. Like, they are really fast. I have had a few different cats growing up, and even just your average domestic cat of indeterminate breed can run fast enough to be a blur from over 20 feet away, while having to dodge around trees and undergrowth because you are in the middle of a forest. And that is when they are just playing around together. They have agility and flexibility to match these things, and a high level of intelligence that is often sorely overlooked just because they are less susceptible to blindly letting themselves be trained at the slightest promise of extra food than dogs are. Got a picture in your mind? Good. Now, scale that up a little, and think of what they could do.
As proof, I offer some of the most commonly known larger cats found in nature:
The Cheetah is memetic even to little kids for the fact that it is literally the fastest known land mammal, and it can change direction incredibly fast. While running, it averages speeds of around 40 mph, or 64 kph, and can sprint at speeds reaching 70 mph, or 112 kph.
The lion is also memetic as the King of the Beasts, and for a good reason. Hunting a single lion in ancient times was generally undertaken by entire parties of armed men, using an entire pack of specially bred and trained dogs to wear them down and distract them. Even then it was considered one of the most dangerous hunts that could be found; possibly the most dangerous. A single glancing blow from a lion's paw can literally crush a person's head, and that's a glancing blow.
These two are most well known because they are the most extreme cases of traits that all cats hold, but those traits are by no means restricted to them. Lions were also known in ancient times for their ability to easily outrun a horse as well as their strength. All cats, in fact, are incredibly fast and strong for their size. Combine that with the flexibility, agility, and body control that lead to myths like them having nine lives or always landing on their feet, and you have one heck of an animal.