I have 0$...
And still no on the Mudskipper. Trust me, a few minutes of research isn't enough. They need almost the same conditions as a turtle would, land, water (Brackish unlike a turtle) and a lamp... They need 55 gallons.
I dunno about the posion darts. Seriously, you said you are 13 like me, are you really ready to take on very rare and expensive animals that can kill you if you try to pet them???
*2 Bettas (for now RIP Ryu) *2 Goldfish *9 Guppies *1 Gourami *2 Chinchillas *2 Budgies *2 Dwarf Frogs *1 Dog *1 Cat *2 Hermit Crabs *2 3gs *1 10g *1 Pond *2 2gs