@WeeklyBattles: I actually mentioned the Bombardier Beetle earlier in this thread, for what it's worth.
https://vsbattles.com/vsbattles/1394603#111
(Sorry if I'm being snappy, but....)Also, I take it from the lack of responses on the topic that
even if they were performed at the Composite Organism's largest sizes, the Aphelidae's abilities aren't notable?
To attempt to paraphrase what I hardly understand from Wikipedia:
The Aphelidae has the ability to, by snapping a specialized claw shut, make cavitation bubbles that create acoustic pressures of up to 80 kPa 4 cm from the claw, reach speeds of 100 km/h & release sound reaching 218 decibels, & corresponds to zero to peak pressure level of 218 decibels relative to one micropascal (dB re 1 ╬╝Pa), equivalent to a zero to peak source level of 190 dB re 1 ╬╝Pa at the standard reference distance of 1 m.
These snap-made cavitation bubbles, when collapsing, also produce sonoluminescence & reach temperatures of over 5,000 K. However, the light is of lower intensity than typical sonoluminescence & is not visible to the naked eye, & seemingly a product of the shock wave.
The Mantis Shrimp can also make such bubbles, but perphas more notable are its arguably Enhanced Senses:
Where human eyes have 3 types of colour receptive cones, Mantis Shrimps have 16 types of colour receptive cones, & some such shrimp can "tune the sensitivity of their long-wavelength vision to adapt to their environment."