Here's the Imgur Album, with images posted in mostly chronological order (upon creation...except the last few which I forgot about and added last), but I figured I'd properly sort images here, in chronological order with respect to the story, so here goes:
image [https://i.imgur.com/AYvYiT5.png]
(Cartoon art of Pryce reading to Fathom, by Rackiera)
image [https://i.imgur.com/NskTsHR.png]
(Pryce being sleep-deprived, by Nirvanacuga)
image [https://i.imgur.com/6Cs1R5v.png]
(Pryce lending Fathom his chronometer, by me)
image [https://i.imgur.com/hFSvvcm.png]
(Fortitude sorta-restraining Devotion, by Rackiera)
image [https://i.imgur.com/2PsPZAj.png]
(Fathom helping Pryce use the sextant)
image [https://i.imgur.com/wJBh5Eb.png]
(The dangers of carelessly using language around a dragon, by Rackiera)
image [https://i.imgur.com/8lKbZRp.png]
(Celeste sharpening her talons)
image [https://i.imgur.com/sZ1xCtF.png]
(Fatal struggle, by Bloov)
image [https://i.imgur.com/q2qEzJ0.png]
(Tipping point, by Rackiera)
image [https://i.imgur.com/Bxl3Yf2.png]
(Kerak, by Bloov!)
image [https://i.imgur.com/wZbngxZ.png]
image [https://i.imgur.com/Sb6bkdY.png]
image [https://i.imgur.com/ytwU0RJ.png]
(Helsha's backstory, by Rackiera!)
image [https://i.imgur.com/6wL7Y8z.jpeg]
(Everyone, by Rackiera! These humans are smaller than most IRL ones.)
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Okay, now here's "non-canon" art sorted by artist:
Rackiera:
image [https://i.imgur.com/4VWd0xg.png]
(First drawing of Fathom!)
image [https://i.imgur.com/m08n1oM.png]
(Fixed version, but still old design)
image [https://i.imgur.com/GTXgonN.png]image [https://i.imgur.com/edgDxro.png]
image [https://i.imgur.com/aQkMNOl.png]
image [https://i.imgur.com/XBk3nGj.png]image [https://i.imgur.com/9eKrlxn.png]
(Old designs of the first quartet!)
image [https://i.imgur.com/PVW3lNc.png]
(Fathom's head)
image [https://i.imgur.com/2CaBsWv.png]
(Christmas Fathom!)
image [https://i.imgur.com/xFYEUlO.png]
(Emotes by Rackiera!)
image [https://i.imgur.com/5ECKzFD.png]
(Valentine's art by Rackiera!)
image [https://i.imgur.com/i93wVdT.png]
(Iakahn, character and art by Rackiera!)
image [https://i.imgur.com/DjOOSyd.jpeg]
(Another piece of art by Rackiera!)
Updated-design-of-default-dragon-by-Rackiera [https://i.imgur.com/6EqByFg.png]
(Updated dragon template by Rackiera)
image [https://i.imgur.com/RZdpiNT.png]
Ensure your favorite authors get the support they deserve. Read this novel on the original website.
image [https://i.imgur.com/qE2riCw.png]
image [https://i.imgur.com/VRvdiWa.png]
image [https://i.imgur.com/R4hhZpW.png]image [https://i.imgur.com/Qam6Da3.png]
image [https://i.imgur.com/eLtM2Ev.png]
image [https://i.imgur.com/KnBrwux.png]
image [https://i.imgur.com/T8z7GAt.png]
image [https://i.imgur.com/nrrkKRr.png]
image [https://i.imgur.com/xx4GFn1.png]
image [https://i.imgur.com/5QfcqOB.png]
image [https://i.imgur.com/SOY5u4H.jpeg]
(Patterns as they appear to another dragon)
image [https://i.imgur.com/Ji9dXAf.png]
(A basking Helsha and a helpful bird who's picking bugs out from under his scales)
image [https://i.imgur.com/qCkq7eC.png]
image [https://i.imgur.com/NA9d2RF.png]
image [https://i.imgur.com/eOBXB8c.png]
image [https://i.imgur.com/6lrf5FZ.png]
image [https://i.imgur.com/UZ6Txsx.png]
image [https://i.imgur.com/F6aFDhQ.png]
image [https://i.imgur.com/o1haSbD.png]
image [https://i.imgur.com/z46FPBv.png]
(If Pryce had the maturity of a 9-year-old, by Rackiera)
image [https://i.imgur.com/SQY0aOC.png]
(Vosae)
image [https://i.imgur.com/Z9qOnyq.png]
image [https://i.imgur.com/uMdbpa5.png]
(Hatchling Celeste bothering her father)
image [https://i.imgur.com/bZMYGID.png]
(A dragon rubbing their eyes with their wing-thumb)
image [https://i.imgur.com/2b0dSWB.png]
(Human colors are boring)
image [https://i.imgur.com/2xWRyvq.png]
(She's talking about horns)
image [https://i.imgur.com/RF0f545.png]
(Tongs. No, I will not elaborate.)
image [https://i.imgur.com/wFcmvDV.png]
(This is why I didn't give dragons hose-like lips)
image [https://i.imgur.com/eFCTfei.png]
(Drawn in response to me saying that eyeballs are pretty similarly sized across animals, so dragons would have comparatively tiny eyes. This was before the rewrite.)
image [https://i.imgur.com/ioLa71a.png]
(Fathom giving a double thumbs-up, by Rackiera)
image [https://i.imgur.com/PNvBRa7.png]
(My silly edit)
image [https://i.imgur.com/dPdZIa7.png]
(Ketan and Kerak meeting a Falian and their baby from Mekanip's "A Chronicle of Lies")
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Bloov:
image [https://i.imgur.com/6EUUwsd.png]
image [https://i.imgur.com/e9iQpqf.jpeg]
image [https://i.imgur.com/6P1nWc0.jpeg]
image [https://i.imgur.com/9KrLfVN.jpeg]
image [https://i.imgur.com/71YBU0m.png]
image [https://i.imgur.com/rjq52kt.png]
image [https://i.imgur.com/qc0WpGX.png]
image [https://i.imgur.com/jM2j7oI.png]
image [https://i.imgur.com/dOlx5rA.png]
image [https://i.imgur.com/Yjke9Gs.jpeg]image [https://i.imgur.com/WHoGNes.png]
(Dragonriding selfie)
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Me:
image [https://i.imgur.com/CitfNL6.png]
(Fathom smiling(?), by me)
image [https://i.imgur.com/AdG0iL5.jpeg]
(Stupid meme)
image [https://i.imgur.com/yebikGk.png]
(Stupider meme)
image [https://i.imgur.com/alAkFJv.png]
(Another meme. [Pryce's head is poking out from between the wings])
image [https://i.imgur.com/jXoifyC.png]
(Fathom and hatchling Celeste, who is playing with a spore pod.)
image [https://i.imgur.com/kKKWaeB.jpeg]
(A poorly drawn Pryce getting SImba's by a poorly drawn Fathom)
image [https://i.imgur.com/d72Y2sZ.png]
(Fathom being uncertain over which thumb to use for a thumbs-up - the lower quality version of the sticker Rackiera drew)
image [https://i.imgur.com/u9p5goZ.png]
(Vosae being sign-shamed)
image [https://i.imgur.com/WzSE2Rz.png]
(A close-up of Helsha inspecting a bird)
image [https://i.imgur.com/2Q7VmCl.png]
(Colored)
image [https://i.imgur.com/G5uwGMZ.png]
(Helsha POV)
image [https://i.imgur.com/vPHFcB1.png]
(Fathom has a surprise meeting with one of Rackiera's OCs, Areikzar)
image [https://i.imgur.com/NHxaBBJ.png]
(Updated pose)
image [https://i.imgur.com/5Vel5MT.png]
(Colored version)
image [https://i.imgur.com/zaARKDp.png]
And another meme! This one of a baby Celeste or Fathom. Dragon hatchlings look rather similar.
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And one last one, by Mekanip:
image [https://i.imgur.com/06bprv1.png]