Related by context. Frequent words. (Click for all words.) 60 bony plates 59 pectoral fins 59 hind limbs 58 otolith 58 cartilaginous 57 forelimbs 56 otoliths 56 serrated teeth 55 plesiosaurs 55 snail shells 54 featherless 54 flatworms 54 motile 54 Sperm whales 53 crocodilians 53 neural crest cells 53 amphipods 53 gobies 53 planktonic 53 toothed whales 53 stubby legs 53 reproduce asexually 53 rib cages 53 protuberances 53 flagella 52 voracious predators 52 forelimb 52 placental mammals 52 Scientists theorize 52 horned dinosaurs 52 tetrapod 52 snail shell 52 moray eels 51 tetrapods 51 oviduct 51 baleen whale 51 greenish brown 51 daddy longlegs 51 sticklebacks 51 dorsal fins 51 Mangrove snapper 51 goggle eye 51 opposable thumb 51 setae 51 wormlike 51 unicellular 51 mandibles 51 serrated edges 51 regrows 51 tunicates 50 squids 50 resorbed 50 amberjacks 50 mouthparts 50 Indohyus 50 voracious eaters 50 ichthyosaur 50 needlefish 50 baleen whales 50 mottled brown 50 phalanges 50 Diplodocus 50 pectoral fin 50 weedless 50 molted 50 flatworm 50 eiders 50 hadrosaurs 50 com vega oral 50 gastrointestinal tracts 50 webbed feet 50 morphologically 50 bird beak 50 Tiktaalik 49 dorsal fin 49 hind limb 49 mud minnows 49 feathered dinosaurs 49 tadpole 49 gudgeon 49 serrations 49 moulting 49 molts 49 collagen fibers 49 giant squids 49 vertebrate 49 threadfins 49 braincase 49 cartilages 49 misshaped 49 Hox genes 49 thermocline 49 A. afarensis 49 molluscs 49 gilled 49 gelatinous 48 dentine 48 egg sacs 48 stickleback 48 gharials 48 Scientifically speaking