The dimensions are 35x22x21. I will admit our aquascape is not the greatest but this is our first tank.
Okay, what I’m about to say slightly opposes the above advice (which is all really good information! I just have a partially different view).
TLDR: Hawkfish are a bad idea from my experience - I’ve lost many peaceful fish to them. And wrasse wise, look into smaller
Cirrhilabrus species, smaller
Halichoeres, easier
Macropharyngodon species and
Pseudocheilinops ataenia rather than Flashers (
Paracheilinus sp).
But, the Hawkfish I would personally skip if you want other peaceful fish. Especially wrasses and gobies. I’ve had some horrible experiences with hawkfish and mixing them. I have lost several fish to hawkfish including;
Various Leopard Wrasses (Meleagris, Bipartitus, Negrosensis)
Male Radiant Wrasse
A Copperband (I had this guy for 4 years)
And almost a Diamond Tail Flasher
I’ve lost more than just that, but that was from personal experiences in my own tanks/LFS displays, when mixing Hawks in LFS fish systems I now make sure they’re only with tangs and other nasty (often predatory) fish which keeps them in check.
With the dimensions being pretty much 3’x2’, I wouldn’t go for a Flasher. If you want one, I’d only go for a flasher if it’s an Angular Flasher,
Paracheilinus angulatus, the reason why is the species within the Mccoskeri complex (the most common of the small flashers) love to dart around, when they display they use the whole of a 4 foot tank so I personally recommend 4 foot length as a minimum for these fish. A good alternative to flashers are fairies - they don’t use a huge amount of the tank when it comes to it.
Also, if you’re after pest hunters and have a sandbed look at smaller
Halichoeres. These guys have a huge array of bright colours, and well, their utility is amazing. If you’re up for an intermediate species, look at some of the
Macropharyngodon species (Leopards). These do require a sandbed but, their colours are difficult to find in other wrasses.
Another good choice to look at are the
Wetmorella species. These are much smaller wrasses (maxing out at 3 inches for the largest of them). They are also quite useful for pest hunting and don’t require a sandbed either! Another species very similar to these, but it looks more like a sixline (without the nastiness) is
Pseudocheilinops ataenia. Also called Pink Streak Wrasse, these guys are amazing with personality, whilst setting they can be shy (which the
Wetmorella species are very similar to this) but once settled and used to their surroundings, you’ll find them constantly gliding around the rockwork.
a starting list for fish to look at would be;
Cirrhilabrus lubbocki
Cirrhilabrus flavidorsalis
Cirrhilabrus exquisitus
Cirrhilabrus isosceles
Halichoeres iridis
Halichoeres leucoxanthus
Halichoeres biocellatus
Halichoeres chrysus
Macropharyngodon meleagris
Macropharyngodon negrosensis
Macropharyngodon bipartitus/marisrubri
Macropharyngodon ornatus
Pseudocheilinops ataenia
Wetmorella albofasciata
Wetmorella tanakai
Wetmorella nigropinnata