Figure 2.
Representative images of living creatures and their robotic counterparts: a) jellyfish. Top photo by Thomas Millot on Unsplash, bottom reproduced with permission.[ 347 ] Copyright 2019, Springer Nature. b) starfish. Top photo by shahd h on Unsplash, bottom reproduced with permission.[ 19 ] Copyright 2014, Springer Nature. c) octopus. Top photo by Serena Repice Lentini on Unsplash, bottom reproduced with permission.[ 20 ] Copyright 2016, Springer Nature. d) Manta ray. Top photo by Naushad Mohamed on Unsplash, bottom reproduced with permission.[ 21 ] Copyright 2017, American Association for the Advancement of Science. e) fish. Top photo by Rachel Hisko on Unsplash, bottom reproduced with permission.[ 348 ] Copyright 2017, IOP Publishing. f) water‐strider. Top photo by Tanguy Sauvin on Unsplash, bottom reproduced with permission.[ 349 ] Copyright 2011, American Chemical Society. g) frog. Top photo by Joel Henry on Unsplash, bottom reproduced with permission.[ 350 ] Copyright 2020, IOP Publishing. h) eel. Top photo by Francisco Jesús Navarro Hernández on Unsplash, bottom reproduced with permission.[ 351 ] Copyright 2021, IOP Publishing. i) sea turtle. Photo by Wexor Tmg on Unsplash, Reproduced with permission.[ 18 ] Copyright 2016, IOP Publishing.