Indium is fairly toxic but very useful element whose main use is in LCD monitors and similar screens such as those used in mobile devices, TVs, and other liquid crystal displays. It’s also used in bearings and vacuums tube chambers. The glowworm is similar to Indium in that it’s glowing effect comes from its food (so electricity and crystal bonds in Indium case) to produce photosynthesis. Though most glowworms are omnivores, a few are carnivores, using their colonies of glowing bacteria in their rear to attract moths and insects to a long thread of silk like a spiders web, then eating it at their leisure.
Tin is a useful binding metal that has been used for centuries. Its widespread use has mostly been applied in making Pewter and in Solder. It’s fairly non toxic and has one of the most numbers of isotopes of any metal. Vipera Latiffi is a viper that lives exclusively in Iran, and it’s associated with Tin as its highly likely the Tin was discovered and first used near its native range.