ARK’s ETFs are the thematic investment Exchange-Traded Funds (ETFs) from ARK Invest global asset management company.  Currently, ARK Invest offers five active ETFs  (ARK Innovation – ARKK, Autonomous Technology & Robotic ETF – ARKQ, Next Generation Internet – ARKW, Genomic Revolution – ARKG, Fintech Innovation – ARKF) and two index ETFs (The 3D Printing – PRNT, Israel Innovative Technology – IZRL).  This is the latest ETF (Space Exploration & Innovation – ARKX).
See this link, https://mrsenioradvisor.com/index.php/2021/01/23/best-high-growth-etfs/, for descriptions of these ETFs.

See this link, Space Related Growth ETF – MrSeniorAdvisor, for description of the ARKX ETF.