{"id":239364,"date":"2026-06-20T06:10:43","date_gmt":"2026-06-20T11:10:43","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/06\/how-a-brainless-sea-blob-still-feels-touch-and-crawls-away-in-seconds-without-nerves-or-muscles"},"modified":"2026-06-20T06:10:43","modified_gmt":"2026-06-20T11:10:43","slug":"how-a-brainless-sea-blob-still-feels-touch-and-crawls-away-in-seconds-without-nerves-or-muscles","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/06\/how-a-brainless-sea-blob-still-feels-touch-and-crawls-away-in-seconds-without-nerves-or-muscles","title":{"rendered":"How a brainless sea blob still \u2018feels\u2019 touch and crawls away in seconds without nerves or muscles"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/how-a-brainless-sea-blob-still-feels-touch-and-crawls-away-in-seconds-without-nerves-or-muscles2.jpg\"><\/a><\/p>\n<p>For a flat sea creature just a few millimeters across, a gentle poke is instantly recognized as danger. Trichoplax adhaerens\u2014a translucent blob with no head, brain or muscles\u2014scuttles away in seconds when touched. Imagine a flattened multicellular amoeba moving as a single unit: Trichoplax is only ~20 microns thick and a few millimeters wide. It glides on surfaces by beating tens of thousands of cilia on its lower epithelium (the underside), like microscopic oars dragging against the water.<\/p>\n<p>Yet unlike most animals, Trichoplax has no obvious front or back end, no nerves or muscles at all. How can such a simple \u201ccrawling carpet\u201d steer or change direction without a brain?<\/p>\n<p>A <a href=\"https:\/\/www.cell.com\/current-biology\/abstract\/S0960-9822(26)00524-5\" target=\"_blank\">new study<\/a> reveals the remarkable flexibility of this pinhead-sized animal. While in most creatures, the orientation of each cilium is fixed early in development and locked to the body\u2019s axes, Trichoplax achieves its swift escape by reorienting its thousands of hairlike cilia.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For a flat sea creature just a few millimeters across, a gentle poke is instantly recognized as danger. Trichoplax adhaerens\u2014a translucent blob with no head, brain or muscles\u2014scuttles away in seconds when touched. Imagine a flattened multicellular amoeba moving as a single unit: Trichoplax is only ~20 microns thick and a few millimeters wide. It [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-239364","post","type-post","status-publish","format-standard","hentry","category-neuroscience"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/239364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=239364"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/239364\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=239364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=239364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=239364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}